Smithsonian Channel HDTV (East) (SMITHHD)

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An aerial tour of Arkansas, featuring its rivers and wilderness. (Repeat).

Featuring the city where the West begins, where President Kennedy was assassinated and where oil wells created huge wealth. Flying above the skyline made famous by the TV series "Dallas." (Repeat).

A flyover tour of unique roadside attractions. (Repeat).

A flyover tour of Rhode Island. (Repeat).

A flyover tour of Oklahoma. (Repeat).

A flyover tour of Illinois. (Repeat).

A flyover tour of Wisconsin. (Repeat).

A flyover tour of Ohio. (Repeat).

A scenic cross-country flight, from the mountains to the prairies, and from sea to shining sea. (Repeat).

History's most terrifying air disasters, and the investigations that followed, are revisited and reexamined. (Repeat).

A new investigation shines light on the controversial 1961 plane crash that killed UN Secretary General Dag Hammarskjöld. (Repeat).

A false warning in the cockpit triggers a series of pilot errors, sending a commuter plane crashing by the runway of an Amsterdam airport. (Repeat).

The 2011 crash of Yak-Service Flight 9633 near Yaroslavi, Russia, is recalled. The entire Lokomotiv Yaroslavl hockey team died in the tragedy. (Repeat).

Just days after Christmas in 2014, an Airbus A320 en route to Singapore disappears over the Java Sea. A massive search confirms the worst: the plane has crashed, killing all 162 on board. Speculation runs wild about what could have brought the airliner down, and an international team of experts comes together to help determine what caused AirAsia Flight 8501 to plummet from the sky. (Repeat).

History's most terrifying air disasters, and the investigations that followed, are revisited and reexamined. (New).

Architects and engineers build an eco-friendly convention center on Vancouver's waterfront, a lift bridge in Bordeaux, and a cocoon-shaped skyscraper in Tokyo, each with unique challenges like marine habitats, massive spans, and (New).

History's most terrifying air disasters, and the investigations that followed, are revisited and reexamined. (Repeat).

Architects and engineers build an eco-friendly convention center on Vancouver's waterfront, a lift bridge in Bordeaux, and a cocoon-shaped skyscraper in Tokyo, each with unique challenges like marine habitats, massive spans, and (Repeat).

A New York skyscraper defies the laws of physics. The world's tallest outdoor lift, built on the side of a Chinese mountain, is featured. A building mimics a ship at sea. (Repeat).

A visit to the Vancouver House, Norway's Under restaurant, and the Seattle Central Library to discover how these visionary buildings were created. (Repeat).

Take a trip to Rotterdam, Guangzhou, and London and witness astounding feats of design and engineering. (Repeat).

Travel to a French valley, a Shanghai quarry, and the middle of Milan and witness architectural and engineering wonders. (Repeat).

A look at the design and engineering secrets behind the Audain Museum and the Grand Canyon Museum. (Repeat).

Featured are the world's longest sky gardens, a radical railways station built in the shadow of an active volcano, and the world's most slender tower. (Repeat).

An investigation on what caused the Kazakhstan Airlines and Saudi Airways to collide mid-air. (Repeat).

The 1991 crash of Continental Express Flight 2574 in Texas, which killed 14 people, is investigated. (Repeat).

Emery Worldwide Flight 17 leaves Sacramento Mather Airport in February 2000 while carrying a load of freight containers. Upon takeoff, the aircraft dives repeatedly and banks to the left. The pilots attempt to regain control of the crippled plane and return to the airport, but the DC-8 crashes a mile from the runway, killing all three crewmembers. Investigators suspect the cargo was loaded imprope

China Airlines Flight 140 is less than three minutes from touching down at Japan's Nagoya Airport. Suddenly, the highly automated A300 gains speed and won't respond to the pilots' nose-dive commands. After an aborted landing and attempted go-around, the aircraft stalls and crashes into the ground, killing 264 passengers and crew. With so many A300s in service around the world, investigators must d

On a commuter flight from Minneapolis to Hibbing in 1993, Northwest Airlink Flight 5719 descends into the clouds on a cold Minnesota night. Suddenly, the pilots of the twin-engine turboprop find themselves ricocheting off the treetops, crashing violently into a hillside. Investigators face intense pressure to find the cause of the crash that killed all 18 people on board. (Repeat).

Aviation disasters and near misses that were caused by severe-weather encounters. (Repeat).

Revisited are three tragedies caused by diversions in the cockpit. (Repeat).

A last-minute repair may have played a key role in the crash of a plane leaving Madrid International Airport in August 2008. (Repeat).

Two deadly Boeing 737 crashes during the 1990s are investigated. (Repeat).

History's most terrifying air disasters, and the investigations that followed, are revisited and reexamined. (Repeat).

Investigators discover a minor maintenance issue that caused the crash of an Australian seaplane with a UK billionaire and his family. (Repeat).

Heroic flying isn't enough to overcome neglectful maintenance in the tragic accident of Alaska Airlines Flight 261. (Repeat).

A plane crash in the Florida Everglades leads to a dangerous rescue effort and an explosive investigation. (Repeat).

History's most terrifying air disasters, and the investigations that followed, are revisited and reexamined. (Repeat).