The history of the longest serving bomber in the U.S. military: the B-52 Stratofortress.

The 50-year evolution of the Army's top transport helicopter, the CH-47 Chinook.

Alaska Airlines 261 nosedives into the Pacific leaving investigators stumped . A rare storm and a deadly design flaw intersect cause American Eagle 4184 to fall from the sky. And, investigators suspect a fatal flaw in the Boeing 737.

The crews of three doomed aircraft make catastrophic blunders.

Faced with the extreme conditions of the far North, three flights fall out of the sky leaving investigators to uncover the cause.

Indonesian investigators must determine why a Boeing 737 Max 8 -- one of the world's best-selling new airplanes -- plunged into the Java Sea.

Three catastrophic runway collisions raise the same pressing question; a look at how two planes end up on the same runway at the same time.

An aerial tour over the places made famous by America's most influential men and women.

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

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

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.

The stories and sights of Hawaii's major islands.

The Lone Star's rugged canyons, historic ranches and modern cities.

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

A view of Idaho from the air reveals a state filled with agricultural fields, lands untouched by human hands, and riches in the form of gold, ski resorts and spuds.

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.

An aerial tour over Kentucky reveals a state of racetracks, country music highways, bourbon distilleries and a history of feuds and traditions.

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

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.

A 1.2 million square foot office building balances precariously on a 39 foot wide base in Chicago. A building named Pterodactyl lands on top of a Los Angeles parking garage. And the world's longest suspension footbridge.

Witness amazing buildings, bridges, lifts, and other structures that pushed structural concrete engineering to the edge.

Building an eco-friendly visitor centre in the permafrost on Colorado's Pikes Peak tests the team. A museum is constructed in a disused dry dock that's in danger of collapse.

An orphaned bear cub flies to a new home, bush pilots bring life-saving medical machinery to a remote village, record snowfall threatens to close down Anchorage Airport for Thanksgiving, and the US Army prepares for airborne war.

A breakdown on the Fairbanks runway threatens a heavy-weight military jet's urgent mission; a rookie flight instructor faces a make-or-break flight; an ice-tour pilot races against Alaskan weather; a bush airline flies a 400-mile pizza delivery.

Building an eco-friendly visitor centre in the permafrost on Colorado's Pikes Peak tests the team. A museum is constructed in a disused dry dock that's in danger of collapse.

On its final approach to Charlotte, N.C., US Air Flight 1016 is engulfed in intense rain obstructing the view from the cockpit; the pilots abort the landing, but the aircraft crashes to earth, hurtling along a road and breaking apart.

SAS Flight 686 takes off from Milan's Linate Airport and moments later collides with a Cessna on the runway.

Pilots of Southern Airways Flight 242 must try to land on a Georgia highway after the engines die and the windshield shatters.

Chalk's Ocean Airways flight 101 crashes just after take-off from Watson Island in Miami on December 19, 2005, killing 20 people.

An Air Inter flight crashes into the Vosges Mountains while attempting to land killing most of the 96 passengers.

An aerial tour of northern Greece explores Mount Olympus, Macedonia, the island of Corfu and more; the lifestyles of the region's inhabitants.

Capturing from high, the islands Crete, Samos, Chios, Rhodes and the Dodecanese; exploring the distinct culture and unique stories of these islands.

An aerial tour over southern Greece celebrates its landscapes, its ancient and mythical past and the people who call it home.

An exploration of the Cyclades in the Aegean Sea; exploring the tourist hotspots of Mykonos and Santoríni to Náxos and Amorgós.

An aerial tour over New Zealand showcases a diverse world of snow-capped mountains, active volcanoes, and a storied past.

A sky-high tour over Ireland reveals its towering cliffs, rolling hills, ancient ruins, and rich history.

On 21 February 2008, Santa Bárbara Airlines Flight 518 strays off course and flies into the side of a mountain shortly after takeoff.

On 20 August 2011, First Air Flight 6560, a charter flight, crashes near its destination of Resolute Bay Airport, Resolute, Nunavut, Canada, in poor weather conditions; out of the fifteen passengers and crew members, only three survived.

A look at accidents and incidents where problems with the interface between crew members and onboard avionics are a factor, and the causes of those problems.

Mid-air tragedies are particularly horrifying when they occur over a community, and rain terror on the people below.

When a cargo plane crashes at a U.S. airfield in Afghanistan, investigators reach a conclusion that ultimately proves incorrect.

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.

On 18 June 1972, British European Airways Flight 548 stalls and crashes in a field near Staines shortly after takeoff from London Heathrow Airport, killing all 118 people on board.

After a Boeing 727's near-fatal nosedive over Michigan, investigators risk their own lives to determine what caused the aircraft to lose control.

The inside story of one of history's most infamous and complex investigations: the 1996 crash of TWA Flight 800.

A plane crash lands in Guam after losing sight of the airport in a storm.

Building an eco-friendly visitor centre in the permafrost on Colorado's Pikes Peak tests the team. A museum is constructed in a disused dry dock that's in danger of collapse.

Turkish Airlines Flight 1951 stalls and crashes less than a mile from the runway while approaching Amsterdam Airport Schiphol.

In the skies above the Mojave Desert, the VSS Enterprise accelerates toward the outer reaches of Earth's atmosphere, guided by test pilots; the aircraft breaks apart and falls from the sky, killing the flight's co-pilot.

A simple error years prior causes the deadliest single-plane crash in history.

The 2010 crash of Ethiopian Airlines Flight 409 sparks rumors of terrorism.

Pilots of Eastern Airline Flight 401 try to determine why both landing-gear lights do not function on an L-1011, tragically distracting them.

An Alitalia airliner crashes into a forested hillside just a few miles from a Zurich runway.

Human flaws cause three plane crashes in England, Colorado and Minnesota.

The world's latest, most-advanced expedition cruise ship Roald Amundsen whisks passengers on an adventurous voyage to Antarctica.

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

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

The Sky Princess carries passengers from Fort Lauderdale, Florida, to three Central American stops.

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

The Paul Gauguin offers five-star luxury while sailing near the coral reefs, mountainous islands and tropical playgrounds of French Polynesia.

On Europe's high-speed rail network, between Barcelona and Madrid, crews work to expand the infrastructure for a new train.

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

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

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

Filled with big toys, guests fly the trapeze, surf and skydive without ever leaving the world's most innovative cruise ship.

The world's top cruise ship, the Crystal Serenity visits Sydney harbor, the port of Melbourne, Bali, a large-scale furniture load in Semarang, Indonesia and the port of Singapore.

New luxury liner Le Soleal navigates the uncharted waters of Indonesia to give her passengers one-of-a-kind encounters at exotic destinations.

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

The C-2 Greyhound's design allows it a flexibility and access that few other fixed wing craft possess; for the U.S. Navy, it provides critical logistics support, flying 1,000 miles in a matter of hours and transporting high-priority cargo.

A trip through Lima details the voyage's breathtaking scenery and engineering challenges.

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

Costa Diadema's seven-day cruise around the Mediterranean offers Italian delights to its passengers and challenges to its captain and crew.

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.

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.

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.

Cruise among the icebergs of Greenland and the Canadian High Arctic aboard the expedition cruiser Ocean Endeavour.

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

A suspected toxic leak grounds a 737 at Anchorage International, engine trouble endangers the mid-air refuelling of the USAF's most advanced fighter jets in Alaska, and a discovery at airport customs busts a potential smuggling.

A national snowstorm brings U.S. aviation to a standstill, but Anchorage fights through the storm; USAF aircrews endure the toughest survival training on Alaska's North Slope, and a veteran aircraft flies life-saving cargo.

A family-run airline flies emergency supplies to a remote village hit by water pollution; Alaska's biggest cargo airline loads high explosives on a busy runway; Anchorage's elite pilots come to the rescue of a holiday party.

Record-breaking snow in Anchorage could shut down the airport; a novice pilot tests his nerve landing on a frozen lake; USAF aircrews battle the toughest Arctic survival training; a unique aircraft workshop Alaska-proofs a vintage.

Hurricane Hunters fly into a storm to save lives in Alaska's bush. A rookie chopper pilot faces dangerous winds, snowstorms threaten vital combat training for USAF in the Arctic Circle.

Travelers from Anchorage get stranded halfway to an island in the Bering Sea, extreme skaters fly into the wilderness in search of Wild Ice, and Alaska's premium cargo airline fights to deliver a team of huskies.

A dazzling new 1400 foot tapering skyscraper is built right next to New York's Grand Central. A curving wine museum requires ingenious engineering in Bordeaux, France. And possibly the world's most glamorous parking garage.

Witness amazing buildings, bridges, lifts, and other structures that pushed structural concrete engineering to the edge.

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

A London railway station; giant Singapore biodomes; eye-catching hospital in Las Vegas.

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.

Building an eco-friendly visitor centre in the permafrost on Colorado's Pikes Peak tests the team. A museum is constructed in a disused dry dock that's in danger of collapse.

A suspected toxic leak grounds a 737 at Anchorage International, engine trouble endangers the mid-air refuelling of the USAF's most advanced fighter jets in Alaska, and a discovery at airport customs busts a potential smuggling.

A national snowstorm brings U.S. aviation to a standstill, but Anchorage fights through the storm; USAF aircrews endure the toughest survival training on Alaska's North Slope, and a veteran aircraft flies life-saving cargo.

A family-run airline flies emergency supplies to a remote village hit by water pollution; Alaska's biggest cargo airline loads high explosives on a busy runway; Anchorage's elite pilots come to the rescue of a holiday party.

Record-breaking snow in Anchorage could shut down the airport; a novice pilot tests his nerve landing on a frozen lake; USAF aircrews battle the toughest Arctic survival training; a unique aircraft workshop Alaska-proofs a vintage.

Hurricane Hunters fly into a storm to save lives in Alaska's bush. A rookie chopper pilot faces dangerous winds, snowstorms threaten vital combat training for USAF in the Arctic Circle.

Travelers from Anchorage get stranded halfway to an island in the Bering Sea, extreme skaters fly into the wilderness in search of Wild Ice, and Alaska's premium cargo airline fights to deliver a team of huskies.

US Airways Flight 1549 suffers a bird strike with a flock of Canada geese, causing both engines to fail.

The roof of an Aloha Airlines 737 tears off the plane at 24,000 feet in the sky.

Two 747s collide on the runway of a small airport in the Canary Islands, resulting in history's deadliest air crash.

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.

A plane carrying Mexico's interior minister crashes into Mexico City's financial district.

Stories of espionage at sea, including deadly U-boat cat-and-mouse games during WWI, the sinking of the Lusitania, a gun-smuggling private yacht that made history, and liners turned troopships.

The legendary Battle of Trafalgar in 1805, which pitted Napoleon's French ships against a British armada under the command of Admiral Horatio Nelson.

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 portrayal of a crucial September 1950 military operation that helped the UN and ROK gain the upper hand over North Korea in the Korean War.

Examining some of maritime history's most effective lightning strikes; how the French frigate Nivôse set a trap to lure Somali pirates; how the HMS Illustrious captured a well-defended Mediterranean harbor in WWII; a surprise attack on Tokyo in 1942.

A look at how the art of deception was used by naval forces in the first half of the 20th century; in 1939, the German raider Atlantis is equipped with fake funnels, while its sailors dressed as women pushing prams to fool Allied merchant ships.

Revolutionary ship design helped Sir John Hawkins and Sir Francis Drake lead England to defeat the Spanish Armada and become a world power.

A look at Naval warfare's fastest combat ships and how the advantage of speed determined the outcome of some of the great seas battles of the last 150 years.

Bad design, human error and the enemy sent great ships to tragic ends, like Britain's K13 submarine and HMS Hood, Sweden's 17th century Vasa, and Kublai Khan's fleet, sunk by the original kamikaze.

The evolution from wooden ships to metal ones in the second half of the 19th century is examined.

The 200-year evolution of the submarine in wartime is examined, told by the designers and engineers behind the machines.

An up-close look at the naval carriers, destroyers, and nuclear submarines of the Cold War.

Exploring the world's top close air support aircraft, which enter battles at a minute's notice.

The history of the KC-135 Stratotanker, the 60-year-old aerial refueler that keeps fighter jets flying.

The Marine Corps' V-22 Osprey.

The F-15 Eagle's conquests in Iraq, Yugoslavia and even space.

Innovative engineering allows the P-38 Lightning to fly faster and climb higher than any other WWII warplane; a twin-propeller fighter with heavy armaments packed into its nose, the P-38 becomes one of America's premiere combat planes during the war.

The AH-64 Apache, one of the most heavily fortified and well-armed helicopters ever built.

Exploring the history of the F-18 and how the U.S. Navy's dual-role aircraft has dominated both the air and the battlefields for over three decades.

The inside story of the Harrier, the world's most famous short takeoff and vertical landing fighter jet.

The history of the B-1 Lancer reveals how the Cold War bomber evolved to become one of Americas most effective military aircraft.

A countdown of the most influential and impactful military planes of the Cold War, from America's B-2 to the Soviet's MiG-15.

The inside story of the F-86 Sabre, one of America's first fighter jets, and its epic battles against the Soviet MiG jet during the Korean War and beyond.

A look at the top U.S. military aircraft in America's modern arsenal, including the F-117 Nighthawk stealth fighter, the hybrid V-22 Osprey, and more.

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 Empire State of the South; ancient Moundbuilders to the Cherokee Indians.

Viewing Northern Italy from the air; the fashion capital of Milan; the canals of Venice; the peaks of the Dolomites; the colorful coast of Cinque Terre.

A journey across Central Italy from the air reveals the ancient Rome, the bloody medieval battles of Tuscany and the colossal marble quarries of Carrara.

The islands of Italy come in all shapes and sizes; they are home to volcanoes, ancient civilizations and some of the bluest waters on Earth.

Viewing Southern Italy from the air; Greek temples on the Mediterranean; cities that just seem to float above the sea; one of the most powerful volcanoes on Earth.

In Florida, Mike tackles one of the dangerous jobs on the planet, commercial diving; he helps a specialized team keep waterways safe; fixing construction site leaks and removing dangerous structures, all while hurricane season is in full swing.

Witness amazing buildings, bridges, lifts, and other structures that pushed structural concrete engineering to the edge.

A new Olympic and Paralympic museum tests engineers with its trailblazing accessible design. A dazzling curved glass skyscraper battles gravity in Milan. And a student center built under a noisy railroad.

Visiting London's Gherkin, Seattle's Evergreen Point Floating Bridge and Lyon's Musée des Confluences to uncover how and why they were built.

A towering bridge in France; upside-down hotel in China; Italy's forest into the sky.

The engineering secrets behind a massive sky garden in Singapore, the world's most slender tower in Brighton, and a railway station in the shadow of Vesuvius.

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.

Building an eco-friendly visitor centre in the permafrost on Colorado's Pikes Peak tests the team. A museum is constructed in a disused dry dock that's in danger of collapse.

Garuda Indonesia Flight 152 crashes into mountainous woodlands while trying to land at Polonia International Airport in Medan, North Sumatra, in low visibility.

A look at the fate of United Airlines Flight 232 which crashed into Sioux City's runway in 1989; it caused a subsequent explosion that left 111 people dead.

The 2000 crash of an Alaska Airlines plane just off the California coast leads to a disturbing discovery about the company's cost-cutting procedures.

A look at several air disasters that involved small components that failed; accidents caused by minor defects or errors; how the follow-up investigations led to changes that have made flying safer.

Delta Air Lines Flight 1141 crashes beyond the runway while taking off from Dallas/Fort Worth International Airport.

JFK Jr. disappears on the way to Martha's Vineyard; a captain loses his bearings and crashes over the Red Sea; pilots crash a plane over Indonesia.

Following three air crash investigations in which examiners are pushed to the limit to crack the cases.

[EPG Series] History's most terrifying air disasters, and the investigations that followed, are revisited and reexamined.

A Swissair passenger jet catches fire midflight and crashes into the Atlantic, leading to one of the largest investigations in aviation history.

A challenging descent in the Himalayas turns tragic when the pilots miscalculate their approach to a Kathmandu airport.

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

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

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

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

Natural wonders, manmade marvels, hidden treasures and places of inspiration.

An aerial tour of the world's first national park showcases Yellowstone's diverse wildlife and rich history.

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

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

A coast-to-coast aerial journey across America, visiting locations made famous by movies such as Rocky, Citizen Kane, Forrest Gump and others.

Explore the forests, shores, bridges and tunnels of one of American's 13 original states, New Jersey.

An aerial tour of Florida's peninsula and panhandle celebrates the state's sights, unique history and lavish lifestyles.

Great mountain ranges; coal-based economy.

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

A crew of 2,200 on the Symphony of the Seas tends to more than 5,500 passengers as they sail to ports in Spain, France and Italy.

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

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

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

The only cruise ship designed specifically to navigate the treasures and dangers at the southern tip of South America.

Following three horrifying crashes, investigators uncover fatal flaws in the very operations designed to prevent aircraft from flying into mountains.

A plane carrying a Brazilian soccer team crashes just ten miles from the airport in 2016.

A passenger plane veers off the runway in Denver sparking an investigation into the airport's proximity to the Rocky Mountains.

The business jet carrying PGA golfer Payne Stewart and former Alabama football quarterback crashes; how loss of pressurization and structural failure led to this crash and the deadliest aviation accidents in both Greek and Taiwanese history.