Smithsonian Channel HDTV (East) (SMITHHD)

Two copper-clad Manhattan skyscrapers that were bent and connected with a sky bridge is shown. Other feats of modern engineering including Singapore's "The Hive", which is built without a single straight structural component are investigated. Their planners and builders are interviewed and their unique design is scrutinized. (Repeat).

Amazing buildings, bridges, lifts and other structures that pushed structural concrete engineering to the edge. (Repeat).

A flyover tour of the Big Apple includes its five boroughs, Coney Island and Times Square. (Repeat).

A flyover tour of Washington, D.C. (Repeat).

A flyover tour of Pennsylvania. (Repeat).

MSC Divina features Mediterranean design and North American convenience, carrying 4,200 passengers with stops in the Caribbean. (Repeat).

The Norwegian Joy is tailor-made to sail through the daunting waters of Alaska. This 700,000,000 vessel aims to give its passengers an unforgettable experience. (Repeat).

The world's first cruise ship run on liquefied natural gas, AIDAnova visits the volcanic landscape and stunning beaches of the Canary Islands and Madeira. (Repeat).

Viking Sea, an ocean-going vessel that features fine food and Scandinavian décor, is spotlighted. (Repeat).

The crew of the Marina, Oceania Cruises' largest ship, makes a 12-day, five port voyage. (Repeat).

Roald Amundsen tackles the challenges of Antarctica like no other cruise ship with a wave-piercing bow that slices through the Drake Passage, a reinforced hull to protect against ice and a hybrid-energy power plan. (Repeat).

Spotlighting Europa 2, a spacious ship. (Repeat).

Koningsdam is Holland America's newest, largest and most technologically advanced ship; sailing the narrow Norwegian fjords on a mega-ship presents numerous challenges for the bridge team. (Repeat).

A luxury cruise ship navigates narrow rivers in Southeast Asia. (Repeat).

The Seven Seas Explorer cruise ship is full of marble, granite and almost 500 chandeliers. (Repeat).

At 122,000 gross tons, Celebrity Solstice puts the "mighty" in Mighty Cruise Ships. She carries 1,255 crewmembers and close to 3,000 passengers during her summer journeys along Australia's northern coast, offering ten restaurants, over a dozen bars, a casino, and even a manicured grass lawn. Hop aboard on a luxurious 17-day journey Down Under and explore the country's marvels from Solstice's comfo

The Nieuw Statendam is the world's largest boutique cruise ship. (Repeat).

A harsh winter cancels flights but can't keep rescue pilots from saving the day. (Repeat).

Follow ace pilots and their customised aircraft as they keep Alaska's isolated areas fed and connected through winter. (Repeat).

The National Guard attempts a mid-air refuel in a violent windstorm, and the TSA discovers a suspicious package. (Repeat).

A downed pilot makes an emergency call for a helicopter rescue and it's a race to get there in time. (Repeat).

Stories are told of fighter aircraft and deadly combat, including dogfights with the P-38 Lightning andMesserschmittsover Nazi Germany, told through rarely seen battle footage and first-hand accounts. (Repeat).

Inside stories of the most iconic military aircraft of the last 60+ years. (Repeat).

The inside story of the iconic F-14 Tomcat. (Repeat).

Stories are told of fighter aircraft and deadly combat, including dogfights with the P-38 Lightning andMesserschmittsover Nazi Germany, told through rarely seen battle footage and first-hand accounts. (Repeat).

Inside stories of the most iconic military aircraft of the last 60+ years. (Repeat).

The inside story of the iconic F-14 Tomcat. (Repeat).

One of the worst crashes in British history has a stunning cause that changed aviation safety forever. (Repeat).

Examples of expert piloting in emergency situations that saved lives and made headlines in New York, New Orleans, and Canada are examined. (Repeat).

Kenya Airlines Flight 507 was found in mud and water after crashing during a major storm. (Repeat).

The 2000 crash of an Air France Concorde into a Paris hotel is investigated. (Repeat).

An NOAA research plane's 1989 encounter with Hurricane Hugo, a Category 5 storm, is recalled. (Repeat).

An emergency over the French Alps leads to a miraculous landing, followed by the discovery of a small but deadly flaw. (Repeat).

Investigators look into the possible involvement of Cuba after a DC-8 cargo jet crashed on a U.S. base in Guantanamo. (Repeat).

Survival stories. Also: What the industry is doing to keep passengers and crews alive when disaster strikes. (Repeat).

A DC-9 ends up at the wrong end of an active runway and directly in the path of an oncoming 727. (Repeat).

It was a state-of-the-art commuter plane making a simple one-hour flight from Taipei to a Taiwanese island off the coast of China. But within minutes of takeoff, TransAsia Flight 235 plunged into the Keelung River, killing all but 15 people on board. To determine the cause of the crash, investigators examine stunning footage captured by the dashcam of a passing car and uncover shocking evidence ab

The 2008 crash of Santa Barbara Airlines Flight 518, which was traveling in Venezuela from Mérida to Caracas, is examined. (Repeat).

An investigation of a charter plane that moves off course and goes down in Canada's far north. (Repeat).

The Season 5 premiere examines the 1972 crash of BEA Flight 548 shortly after takeoff from London's Heathrow airport. (Repeat).

A collision between two planes at a small airport is investigated. (Repeat).

A 2003 surface-to-air missile attack in Iraq on a DHL Airbus A300, which was carrying letters home from U.S. soldiers, is recalled. The plane was hit moments after departing Baghdad International Airport. (Repeat).

Investigators risk their own lives to determine why TWA Flight 841 fell from the sky in Michigan. (Repeat).

The crash of Air Moorea Flight 1121 in 2007 is recalled. What should have been a seven-minute island-hop from Moorea to Tahiti ended in disaster when the plane crashed into the ocean two minutes after takeoff. (Repeat).