Five aviation disasters and the changes they have forced air-traffic controllers to make.

On 13 January 1982, Air Florida Flight 90 stalls at 300 feet altitude, strikes a road bridge and crashes into the Potomac River, killing 78 people.

A computer glitch causes a highly automated Qantas Airways flight to nearly fall out of the sky; Australian investigators must find the cause before it happens again.

From delusional hijackers to suicidal pilots, three flights fall victim to astonishing acts of sabotage.

A new investigation sheds light on the controversial 1961 plane crash that killed U.N. Secretary-General Dag Hammarskjöld.

Leading aviation experts are confronted with a shocking theory as they investigate one of the greatest aviation mysteries of all time.

When an African airliner mysteriously crashes, Namibian investigators have to rule out a host of possible causes before reaching a conclusion.

Beauty of the Empire State; Central Park; tallest skyscrapers; mighty rivers; 17th century explorer Henry Hudson.

Zoom above, and below, some of the Golden State's greatest monuments.

The stories and sights of Hawaii's major islands.

Soaring above the Cornhusker State's vast farms, towering spires, desolate badlands and gleaming cities.

A sweeping tour over popular destinations in America, including the Badlands, Nantucket, the National Mall and more.

Alpine valleys; Rocky Mountains; Denver's towering skyscrapers.

An aerial journey over Ohio showcases the Buckeye State's autumnal vistas, majestic rivers, epic skyscrapers and battlegrounds.

An amazing aerial tour over Utah reveals a state full of otherworldly landscapes and landmarks, including a history steeped in Mormonism, pioneering tragedy, and Olympic glory.

An aerial exploration of Wyoming reveals the Cowboy State's controversial history while highlighting its breathtaking canyons and volcanic formations.

An aerial tour of Kansas shows a state with varied landscapes, scenic areas and historical conflict sites.

Taking flight for a bird's eye tour of America's rivers, lakes and canals.

Great mountain ranges; coal-based economy.

An aerial tour over America's Great Plains tracks the prairies, farms, oilfields and wildlife.

Vast cotton fields, Gulf coast beaches; famous Civil Rights marches; NASCAR's most dangerous track; steel factories.

A look at America's landmarks, including a view of bears catching clams in Alaska's rivers; a high-flying tour reveals Alaska's call of the wild spirit that has lured adventurers and dreamers north for centuries.

The world's largest volcanic island; Iceland's landscapes, forged by fire and ice; a tour over Alaska, the residents it attracts and the wildlife that thrives in these unique surroundings.

An aerial tour over America's coastlines explores the visual splendor and rich history of the nation's varied borders.

A Northwest Airlines flight cruises above the Bering Sea before problems develop and pilots must make an emergency landing in Anchorage.

An air traffic controller's mistake causes a Boeing 737 to land on a runway already occupied by another aircraft.

On 4 November 2010, shortly after takeoff from Singapore, the number-two engine on Qantas Flight 32 partially disintegrates, causing serious damage to its left wing.

A British Airways flight to Australia in 1982 crashes into the Indian Ocean.

Passengers and crew escape a jet that skid off the runway before catching fire.

When an airbus A330 loses both engines, its pilots must think of a solution before they crash into the South China Sea.

After a seemingly routine landing, a Boeing 737 erupts in flames, putting 165 debarking passengers and crew in jeopardy.

One of the most beautiful states on the Atlantic Coast.

A soaring tour over Washington, D.C. explores the unique landscape, rich history and colorful story of the Nation's Capital.

White sand beaches; Blue Ridge Mountains; Charleston's Rainbow Row.

A cross-country aerial journey over America's most majestic and unique roadside attractions.

An aerial tour over New England captures its beauty while celebrating its rich history; from the Massachusetts harbours, where Americans rebelled against the British, to the autumn colours that blanket the mountains of Vermont.

A high-flying tour over Illinois; the Windy City, prairies and rivers; the state's dramatic history of great fires, crime and historic battles; Chicago's unique skyscrapers and the Lincoln Tomb.

An aerial tour over Dallas and Fort Worth highlights the cities' differences while showcasing their shared contributions to the Texas narrative.

A sky-high tour over Iowa explores its vast stretches of farmland, covered bridges and evolution from wilderness to statehood.

An aerial tour of New York City, spanning the city's five boroughs, capturing man-made and natural wonders; revealing the ways its citizens live, work and play.

Ancestral home of the Abenaki Indians; Henry David Thoreau's first book; Mount Monadnock; New Hampshire is seen from the air.

A flight over Indiana explores the Hoosier State's rich agriculture, busy highways and basketball legends; exploring the War Memorial and the Angel Mounds of the southwest.

A flight over Northern California explores ancient forests, timeless coasts, golden cities and the region's pioneering spirit.

Three FedEx employees must regain control of their plane when a coworker attacks them in midair.

When former race car driver Niki Lauda's planes nosedives into a Thai jungle, a one-in-a-million failure reveals a weak spot in every Boeing 767; radio silence between pilots and air traffic controllers send investigators hunting for answers.

As flames emerge through the cockpit floor, the pilots of Pilgrim Airlines 458 manage a landing on a frozen Rhode Island reservoir.

A cockpit window on British Airways Flight blows out, partially ejecting and injuring the captain; the co-pilot completes an emergency landing.

As flames emerge through the cockpit floor, the pilots of Pilgrim Airlines 458 manage a landing on a frozen Rhode Island reservoir.

On 25 May 1979, the number-one engine on American Airlines Flight 191 detaches moments after taking off from Chicago O'Hare International Airport. The aircraft banks to the left and crashes into an open field, killing all 271 people on board.

As flames emerge through the cockpit floor, the pilots of Pilgrim Airlines 458 manage a landing on a frozen Rhode Island reservoir.

During a storm, a strong gale slams Delta Airlines Flight 191 to the ground, killing most people on board.

A blade on the left-side propeller of Atlantic Southeast Airlines Flight breaks off; the imbalance of the rotating propeller causes the engine to partly tear itself from its mounting.

When a commuter flight crashes mysteriously just a mile from a Missouri runway, investigators turn their attention to the final seconds in the cockpit.

A mechanical problem aboard an Air Canada plane turns into an all-out emergency six miles in the air.

UPS Airlines Flight 1354 clips the tops of trees and crashes into a hillside about one nautical mile short of the runway during final approach to Birmingham-Shuttlesworth International Airport in Alabama.

In one of the world's busiest airports, a large passenger plane crashes into a smaller one; a 1986 midair crash between planes near Los Angeles brings attention to disturbing congestion at airports.

In September 2006, a brand-new legacy business jet collides with a Boeing 737 over the Amazon forest.

Design innovations evolve as a result of terrible air disasters due to pressurization failure or explosive decompression.

The crash of a commuter flight to Detroit leads investigators to a cause the industry has known about for years.

Atlantic Airways Flight 670 careened off the runway and became engulfed in flames.

On the 24th of February 1989, part of the right-side fuselage of United Airlines Flight 811 rips off, ejecting nine people from the aircraft and causing explosive decompression; the flight later lands safely at Honolulu without any more loss of life.

Caught in a major tropical storm, a 737 crashes just short of the runway on a Caribbean island, but the accident may not have been weather-related.

Air France Flight 296 fails to regain altitude after performing a fly-by during an air show at Mulhouse-Habsheim Airport.

A bomb explodes on Air India Flight 182 en route from Canada to India causing it to disintegrate over the coast of Ireland.

United Airlines Flight 718 and Trans World Airlines Flight 2 collide midair over the Grand Canyon in Arizona, killing all 128 people on both aircraft in 1956.

A commercial airliner crashes minutes after taking off from an airport in Bucharest causing suspicions to rise.

After touching down, a Taiwanese commuter plane is rocked by a massive explosion, but investigators find no evidence of a bomb on board.

A design fault leads to an explosion on a DC-10 and two years later the same design fault causes another tragedy.

A freight train carrying an excess of cargo loses its brakes while descending a mountain causing it to gain speed and derail into a neighborhood killing several people.

The dashcam of a passing car captures stunning footage of the final moments of a Taiwanese commuter aircraft as it banks steeply, clips an elevated highway and nosedives into the river; investigators find no signs of pre-impact malfunction.

A Boeing 737 is rocked by a midair explosion that challenges its pilots and nearly ejects a passenger out of a blown-out window.

As flames emerge through the cockpit floor, the pilots of Pilgrim Airlines 458 manage a landing on a frozen Rhode Island reservoir.

A large cargo jet slices into an apartment complex in Amsterdam and reveals a potentially lethal problem threatening every 747 in the sky.

Investigators try to solve the mystery of a plane whose captain and co-pilot are missing.

Trans-Air Service Flight 671 suffers an in-flight separation of its two right engines while en route to Kano, Nigeria, forcing the pilots to make an emergency landing at Istres-Le Tubé Air Base in France.

When a DC-8 cargo jet crashes on approach to a U.S. naval base in Guantanamo, investigators wonder if Cuba played a role.

Facing a cascade of failures and a fire on board, a turboprop is just seconds from landing when it flips over and crashes.

The investigation into the 2014 crash of a TransAsia flight uncovers a systemic problem with the airline.

Three planes fatally out of balance force investigators to question every calculation; it's a flight risk that's entirely preventable, and yet repeated disasters reconfirm the need for critical backup systems.

Japan's largest cruise ship brings East and West together on a cruise featuring cherry.

We hop aboard a seven-day cruise to the Canary Islands and Madeira aboard the first large liner to run purely on cleaner-burning liquefied natural gas.

Sailing from Chile and Peru to Ecuador and Costa Rica, the luxurious Seven Seas Explorer cruise ship is full of marble, granite and almost 500 chandeliers.

Facing Australia's fierce heat, Celebrity Solstice provides guests with views of waterfalls, jumping crocodiles, koalas and the Great Barrier Reef.

Visit Stonehenge, kiss the Blarney Stone and hunt for Nessie on a magical tour of the British Isles, aboard Marina.

Follow mega cruiser Regal Princess as she whisks guests to Germany, Russia, and Scandinavia in style.

The Glacier Express features cutting-edge technology to pull the train up the steepest slopes on its route across the Swiss Alps.

Switzerland's Bernina Express is one of three railway lines on the UNESCO World Heritage list; it navigates 55 tunnels and nearly 200 viaducts and bridges.

Japan's Tokaido Shinkansen, known as the bullet train, operates on a dedicated railway line at up to 177 mph.

The Norwegian Epic is a billion-dollar showboat with more than 20 bars and restaurants and pool decks that transform into nightclubs.

Le Boreal is built to take on the demanding waters of the Southern Ocean.

MSC's biggest cruise ship navigates tight Mediterranean harbors, offering a brand new water park, classic excursions and Cirque du Soleil at Sea.

This 50-year-old ocean liner offers off-season Baltic tours, battling unpredictable weather to deliver one-of-a-kind experiences.

Set a course for breathtaking sights on Koningsdam's 15-day voyage from Amsterdam to the northern tip of Norway.

The CP-140, a spy plane built to protect Canada and her coastlines from unseen enemies is upgraded with the latest technology.

The Indian Pacific is a four-day, 4,352-kilometre transcontinental journey across Australia, a trip which features the world's longest straight stretch of railway and steepest incline.

Take a river tour through some of Europe's greatest cities--Budapest, Vienna, and Amsterdam--on Viking Longship Gefjon.

Azamara Journey travels the rivers of Southeast Asia, delivering passengers to exotic cities and hidden treasures that larger cruise ships cannot reach.

Go behind the scenes with NTV's two Italo trains - the AGV and the EVO - as they expand to cover more of the Italian railway network, connecting passengers from Turin to Venice, and Naples to Milan, on two of the world's fastest trains.

The White Pass and Yukon route was built in 1869 to take miners and supplies to the Klondike gold fields.

One of Holland America Line's largest cruisers makes its debut in the Caribbean, highlighted by a visit to an exclusive private island resort.

Experience romance on a mega cruiser that pampers its guests with the best of Italian design and American convenience.

We follow passengers and crew aboard Viking Star during its two-week tour from Barcelona to its home port in Bergen, Norway.

The new Viking Sea cruise ship whisks guests away on a journey across the Arctic Circle and into the heart of Norway.

Alien port authority in Belgium; ultrathin skyscraper in Manhattan; hanging museum in Scotland.

A new performance center with a tent-like glass-and-steel lobby tests engineers in Kansas City; two twisting apartment towers make heads spin in Ontario.

Exploring the design and engineering stories behind D.C.'s Museum of African American History, the Montreal Tower and the Equinor building in Oslo.

Peek inside a cloud-inspired library in Canada that's built over a live railway; see how clever engineering helped a huge Seattle skyscraper go up without harming its iconic neighbour, then cross an Australian bridge that floats above a busy river.

The engineering secrets behind a mobile research station in Antarctica, a gravity-defying concert hall on the Canary Islands, and a rotating boat lift in Scotland.

Visiting the Hearst Tower in Manhattan and Jewel Changi Airport in Singapore to understand how they were built; covering how designers and engineers attempt to create a museum worthy of Salvador Dali in Florida.

Host Mike Davidson assists on a multi-million-dollar tunnel-boring project underground in Toronto.

Mike Davidson goes on a cross-country road trip to help the Well Done Foundation; they work to find and cap some of the estimated 2 million leaking, toxic abandoned oil and gas wells scattered throughout the U.S.

Mike helps fix the machines that keep one of the United States' biggest ports moving; he assists a team in moving a 3-million pound crane.

Host Mike Davidson helps make high-stakes repairs for one of the world's largest open-ocean fish farm operations in Panama.

A 284ft wooden skyscraper built from 1,200 bespoke pieces tests fire safety limits in Milwaukee; a decaying Amsterdam crane track transforms into glass offices; a needle-thin tower stacks 28 apartments onto a 21ft-wide plot in Melbourne, Australia.

Paying tribute to the brave, gravity-defying design of the U.S. National Medal of Honor Museum; traveling to Singapore for a look at a leaning tower of gambling, then exploring a New York City office building that lets the sun shine through.

The inside stories behind a new, horseshoe-shaped complex in Rotterdam, a rock-shaped opera house in China and a makeover of the British Museum.

A museum building bends 1,100-glass tubes to form a facade and tunnels below the water table; a vast 11-storey glass atrium HQ is built on the former Berlin Wall site to represent unity.

The American Museum of Natural History in NYC gets a cave-like extension; an arts center inspired by migrating birds is built on a lake in China; Boston University gains a fossil-free, Jenga-like tower.

As flames emerge through the cockpit floor, the pilots of Pilgrim Airlines 458 manage a landing on a frozen Rhode Island reservoir.

A helicopter carrying offshore drilling workers crashes into the ocean, leading to an investigation that reveals a fatal flaw in the chopper's design.

A cleaning crew makes a careless error while cleaning a Boeing 757, affecting the plane's computer system and causing it to crash into the Pacific Ocean.

If pilots aren't prepared when the runway is in sight, a landing can quickly become a tragedy.

Flydubai Flight 981 enters a rapid descent and crashes nose-first at Rostov-on-Don Airport in Rostov-on-Don, Russia, after aborting its second landing attempt in poor weather conditions.

Devastating failures in the air put pilots to the test and shine a light on three feats of flying.

On 1 June 2009, Air France Flight 447 stalls and crashes into the Atlantic Ocean while flying through a thunderstorm, killing all 228 people on board.

The captain of a Navy cruiser must quickly determine if an approaching plane is friendly.

In a rush to complete their flights, three different flight crews skip key procedures, ignore signs of danger and make deadly decisions.

A look at experimental ships and revolutionary designers that have changed the tide of war through the centuries.

A look at how technological advances over the centuries have transformed maritime warfare.

Vessels that operate in secret, unseen by their enemies, from secret missions that helped win World War II to modern stealth ships using strange shapes and technology to avoid spying ears and eyes.

A look at how maritime task forces and the Coast Guard are keeping commercial vessels and US shores safe from pirates and drug smugglers.

A retelling of the D-Day invasion and its critical naval operation involving an armada of diverse and ingenious vessels.

A comprehensive look at the naval battle of Guadalcanal in November 1942 and the heroic efforts of U.S. sailors who held off powerful Imperial Navy.

The evolution of amphibious assault vehicles, including the restoration of Britain's last surviving LCT 7074 landing craft, designed to carry six Churchill tanks.

The history of the F-111 and how the fighter-bomber no one wanted went on to dominate both air and battlefields in the late 20th century.

The history of the mean and ugly jet aircraft, the A-10 Warthog.

The fighter plane that helped turn the tide of World War II; the P-51 Mustang.

The massive AC-130 provides unparalleled close air support to U.S. and allied ground troops.

An inside look at the P47 Thunderbolt and the critical role it played in both the European and Pacific Theaters of World War II.

The inside story of the Avro Lancaster, the British bomber that was rushed into service to fight back against Nazi Germany.

The Boeing B-17 Flying Fortress is one of the most lethal bombers of the U.S. Air Force in WWII's European and Pacific campaigns; among other things, the plane delivered food to the German-occupied Netherlands.

In 1944, the Allied invasion of Nazi-occupied Europe brings the hope of freedom and the devastation of war to the people of France.

New colorized footage and testimony reveal the cost paid by the Allies and civilians to free Belgium and the Netherlands from Nazi occupation.

In late 1944, Hitler forces the Americans into their biggest battle of the war when he launches a surprise attack into liberated Belgium.

New colorized footage and testimony reveals the cost of victory, the aftermath of war and the liberation of the camps and the destruction of Germany.

How the legendary "Dambuster" bomber squadron of WWII fooled Nazi Germany into believing the Allied invasion was going to be at Calais, rather than Normandy, and went to on to destroy Hitler's super weapons.

America's first victory in the Pacific during World War II is retold from the vantage point of the three U.S. attack planes as they overcame the enemy ambush to face off against the Mitsubishi A6M Zero, a long-range fighter, in the air.

A look at the rise and fall of the infamous Nazi dive bomber Ju-87 Stuka, an aircraft of World War II.

The Spitfire's legend and role in the Battle of Britain.

The inside story of how the AH/MH-6 evolved over the decades to become an irreplacable aircraft for the U.S. Military.

The inside story of Britain's flagship super jet of the Cold War era, the Hawker Hunter, and its most thrilling flights during the late 20th century.

A tour over two U.S. territories, Puerto Rico and the U.S. Virgin Islands.

An aerial view of major cities in the United States, including Los Angeles, Miami, Chicago and Boston.

A flight over Missouri explores the Show Me State's towering monuments, mighty rivers and spectacular Ozarks.

The birthplace of the Star Spangled Banner; sites Harriet Tubman, Babe Ruth and the DuPont family made their marks on history.

A flight over Massachusetts explores the sites; the Bay State, from Martha's Vineyard to the Bambino's Curse, seen from the air.

America's most remarkable natural wonders are explored including the Grand Canyon, the Great Lakes and more.

A cross-country flight over the nation's mountains, beaches and national parks; visiting other sites that attract adventurers and tourists.

Mistaken identity and hostile fire over enemy territory are among the many risks that pilots face in war zones around the world.

From corrosion and metal fatigue to faulty repairs, three doomed airlines are brought down by gradually deteriorating parts.

When a USAF stealth bomber crashes after takeoff, investigators search for a reason.

When a modified WWII fighter plane crashes into the crowd at a Nevada air show, investigators struggle to find the cause.

A quick trip from Washington D.C. to Ohio in 1994 turns deadly when pilots of a twin-engine turboprop attempt a risky landing.

The pairing of a domineering pilot and an inexperienced first officer has deadly consequences in northern Minnesota.

When an A300 stalls and crashes just before landing in Japan, fears arise about the plane's complex automated systems.

As flames emerge through the cockpit floor, the pilots of Pilgrim Airlines 458 manage a landing on a frozen Rhode Island reservoir.

Polish Air Force Flight 101, carrying the President of Poland Lech Kaczynski, his wife Maria Kaczynska and other top officials, crashes in a wooded area while on final approach to Smolensk North Airport in heavy fog and low visibility.

A billion-dollar Stealth Bomber crashes at a U.S. Air Force base-the costliest aviation disaster ever; bad data misleads a charter flight into a Portuguese mountain and conflicting alarms send a cutting-edge jetliner plunging into the Atlantic.

With hidden flaws buried in their navigation systems, three planes suffer catastrophic computer errors that force investigators to dig deep for clues.

Moments before Pacific Southwest Flight 1771 crashes on a cattle ranch in California, gunshots are heard in the cabin.

When a twin-engine jet careens off the runway in Kentucky, investigators must determine why the plane failed to take off.

On 26 May 1991, the thrust reverser on the number one engine of Lauda Air Flight 004 deploys in flight without being commanded, causing the aircraft to spiral out of control, disintegrate, and crash about 100 miles northwest of Bangkok.

On August 22nd, 1985, 55 people died aboard British Airtours flight 28M when its engine catches fire as it accelerates.

Investigators struggle to understand the unusual flight path and Himalayan crash site of Thai Airways Flight 311.

A helicopter carrying oil workers to an offshore drilling platform crashes.

Mississippi from above; the state's unique beauty and history; mighty waters, ancient trails and the birth of the Delta Blues.

A soaring tour over Southern California explores the stunning beaches, vast deserts, sprawling city and unique culture.

A coast-to-coast tour over America's man-made structures, old and new; the Statue of Liberty and the Golden Gate Bridge.

Taking an aerial tour of Virginia.

A high-flying tour of Connecticut; exploring the safe harbors, buildings and rich maritime history; the home state of Mark Twain, PT Barnum and Katharine Hepburn; the exclusive Gold Coast, the Thimble Islands and the historic cities.

From battlefields where hundreds died to Beale Street where musical legends were born.

Northern state's green forests; red-painted barns and sugar maples.

An aerial view of Arkansas, where settlers' westward journeys began and the scene of Bonnie and Clyde's most serious crime; a view of the land of raging rivers, vast wilderness and legends of the Wild West.

An aerial tour of Nevada; the state's deserts, ghost towns, neon cities and Hoover Dam; its history built on epic booms and busts.

A coast-to-coast aerial tour celebrates the best small towns in the United States and tells stories about the men and women who called them home.

The South's famous landmarks, historical milestones and unique culture.

A journey over America's western landscape featuring "wild" history and stories of colorful characters.

The stories and sights of Hawaii's major islands.

America's first victory in the Pacific during World War II is retold from the vantage point of the three U.S. attack planes as they overcame the enemy ambush to face off against the Mitsubishi A6M Zero, a long-range fighter, in the air.

On D-Day, Allied forces land in Normandy, France, to beat back the German troops and liberate France; previously unseen archival footage captures the 85-day struggle to liberate Europe and includes rare images of the battle itself.

In 1944, the Allied invasion of Nazi-occupied Europe brings the hope of freedom and the devastation of war to the people of France.

New colorized footage and testimony reveal the cost paid by the Allies and civilians to free Belgium and the Netherlands from Nazi occupation.

In late 1944, Hitler forces the Americans into their biggest battle of the war when he launches a surprise attack into liberated Belgium.

New colorized footage and testimony reveals the cost of victory, the aftermath of war and the liberation of the camps and the destruction of Germany.

Personal accounts of the atomic attack on Hiroshima in 1945; the comprehensive story of the bombing of Hiroshima, from those who built it, dropped it, and survived it.

America's first victory in the Pacific during World War II is retold from the vantage point of the three U.S. attack planes as they overcame the enemy ambush to face off against the Mitsubishi A6M Zero, a long-range fighter, in the air.

On D-Day, Allied forces land in Normandy, France, to beat back the German troops and liberate France; previously unseen archival footage captures the 85-day struggle to liberate Europe and includes rare images of the battle itself.

The stories and sights of Hawaii's major islands.

A flying tour of Michigan's cultural landmarks, including Motown, the Great Lakes, the automobile industry and more.

Tour the Wisconsin State Capitol and Milwaukee City Hall, once the tallest building in the world.

A cross-country flight over icy landscapes in Alaska's Denali, vast wetlands in Florida's Everglades, and over 100 million acres of badlands, deserts, and mountains.

The Wright Brothers gave the state its slogan "First in Flight"; civil rights leaders in Greensboro; NASCAR.

A cross-country flight across America reveals the nation's most iconic industries, the people behind them and the stories of how they came to be.

A flight over North and South Dakota reveals the shared history and the vast differences of these sibling states.

An aerial view of New Mexico; exploring its landscapes and landmarks, while revealing its many legends and secrets.

An aerial journey across Montana celebrates the Treasure State's adventure-filled history while showcasing its sprawling farms and rugged terrain.

A small state has a whole lot of history.

Oregon's Cascade Mountains; Columbia River waterway.

A high-flying tour of Pennsylvania.

A sky-high tour over Minnesota reveals the state's ancient, glacial landscapes and tells the stories of the pioneers who helped build the nation.

A day-long aerial tour of the New England city of Boston in Massachusetts; where Americans first rebelled against Britain by dumping chests of tea into the harbor and where rock band Aerosmith first made it big.

The two-man crew of a UPS cargo jet must attempt an emergency landing when a fire in the cargo hold fills their cockpit with smoke.

Investigators try to find the cause of two similar air crashes that happened nearly 12 years apart.

Colgan Air 9446 nosedives into the waters off Cape Cod just minutes after takeoff following a four-day maintenance stop.

In 1991, a Boeing 737 operating as United Airlines Flight 585 suddenly rolls into a dive and crashes within eight seconds, killing all 25 people on board.

Colgan Air 9446 nosedives into the waters off Cape Cod just minutes after takeoff following a four-day maintenance stop.

When Germanwings Flight 9525 crashes in the French Alps, investigators discover shocking truths about the co-pilot's mental health.

Colgan Air 9446 nosedives into the waters off Cape Cod just minutes after takeoff following a four-day maintenance stop.

On 27 November 2008, an aircraft on a post-maintenance test flight operating as XL Airways Germany Flight 888T stalls and crashes into the Mediterranean Sea off the coast of France, killing all seven people on board.

In 1999, EgyptAir Flight 990 crashes into the Atlantic Ocean while flying from New York City to Cairo, killing all 217 people on board; the cause of the crash is disputed.

Northwest Airlines Flight 255 crashes shortly after take-off in Detroit in 1987; a fatal preflight error caused the second-deadliest plane crash in the U.S. history.

Three crews experience the same devastating event; with radically different outcomes when an engine falls off their commercial airplane.

How routine flights can turn catastrophic in mere seconds when the pilots become momentarily distracted; three flights end in a disaster.

Almost immediately after taking off from Madrid International Airport, Spanair Flight 5022 banked to the right, slammed into a creek and burst into flames.

Martinair 495 crashes on a rain-soaked runway in Portugal, showing how weather can doom a landing; American 1572 hits a storm and loses both engines amid a tower shutdown; crosswinds challenge an Air France crew already halfway down the runway.

An examination of three crashes that occurred when pilots battled against their sophisticated aircraft.

A private jet attempting to compensate for a late approach to the airport, slams into an Ohio apartment building just a couple of miles from the runway.

A high-stakes demonstration flight in Indonesia turns catastrophic when a Russian jet slams into a mountain.

A complex recovery operation is launched to find out if a 747 which disappeared into the Indian Ocean was carrying illegal weapons.

Pilots are prepared to cope with a range of emergency scenarios, but failures in training can lead to catastrophe in the cockpit.

After taking off from Taiwan, a China Airlines 747 suddenly disappears from radar and crashes, killing 225 people.

A 747's cargo door opens at 23,000 feet, causing an explosive decompression that ejects nine passengers from the plane.

When Air Transat Flight 236 runs out of fuel over the Atlantic, its pilots desperately try to keep their Airbus A330 in the air until they reach land.

The U.S. Aviation Weather Center in Kansas City, Miss.; the importance of accurate weather forecasting to the aviation industry.

On 10 January 2000, Crossair Flight 498 crashes just two minutes after takeoff from Zürich, Switzerland, while heading for Dresden, Germany, killing all 10 people on board.