Smithsonian HD Network

Three flights headed for disaster are saved at the last moment by heroes in the cockpit.

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.

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

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

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

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

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.

Viewing Oklahoma from the sky reveals a state filled with tall-grass prairies and man-made wonders; the Dust Bowl, Tornado Alley and buffalo-filled plains; it also shows a history steeped in tragedy and devastation.

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

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.

Home to some of America's highest mountains; Mount St. Helens.

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.

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 harbors, where Americans rebelled against the British, to the autumn colors that blanket the mountains of Vermont.

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

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.

The engineering secrets behind the world's steepest mountain railway, a remodeled 145-year-old museum and a futuristic condo.

An unstable high rise, an otherworldly museum, and a towering cliffside elevator.

Visiting the Vancouver House, Norway's Under restaurant and the Seattle Central Library to discover how these visionary buildings were created.

Traveling to New York, Denver and Nice, France to visit Little Island, the Denver Museum of Art and La Tête Carrée; the secrets to how they were built are revealed.

A Manhattan high-rise; an Athens cultural center; a Singapore university.