Smithsonian Channel HDTV (East) (SMITHHD)

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 look at buildings, lifts, and bridges, that pushed structural concrete engineering to the edge. (Repeat).

A gravity defying university building in Sydney, Australia, is clad in 320,000 bricks. Engineers grapple with making an angular arts center tornado proof in Oklahoma. And a plant-filled office building. (Repeat).

Engineers are grappling with an apartment complex that has been ripped apart by a man-made canyon. The renowned Gateway Arch takes shape in St. Louis, Missouri. (Repeat).

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. (Repeat).

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).

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).

Sky Princess is loaded with big tech to get the job done, whether it's sailing into tight ports; battling strong winds and currents; feeding more than 3500 guests; or helping passengers locate their friends on the ship. (Repeat).

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. (Repeat).

The world's biggest river-cruising company makes a big splash in the ocean-cruising industry. Visiting southern Spain, Normandy and the canals of Amsterdam, the crew navigates narrow passages and battles rough seas. (Repeat).

In the Season 2 premiere, Carnival Vista carries more than 4,600 passengers and boasts 10 restaurants, nearly 2,000 staterooms and a crew of 1,400 ready to tend to guests' every need. (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).

Hitler unleashes the full power of the German military, threatening the world. (Repeat).

The German blitzkrieg across Europe in 1940, but failure to defeat Britain, is detailed. Also: Hitler's decision to turn against the Soviet Union. (Repeat).

Churchill's refusal to consider peace with Germany; Germany's attack on the USSR. (Repeat).

The Japanese attack on Pearl Harbor in 1941. (Repeat).

The war's conclusion and death toll. (Repeat).

The final stages of the war, including the 1944 Allied invasion of Italy; the 1945 defeat of Germany and Hitler's suicide; and Japan's surrender on the deck of the USS Missouri. (Repeat).

The Supermarine Spitfire is spotlighted. (Repeat).

An inside look at Japan's A6M Zero, the most feared fighter at the start of World War II. (Repeat).

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

After Corporate Airlines 5966 crashes, investigators uncover an ominous conversation in the cockpit that set the tone for disaster. (Repeat).

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

After a terrifying crash, survivors face a new challenge: surviving the remote Brazilian jungle. (Repeat).

Airplane crashes involving high-profile passengers put added pressure on investigators. (Repeat).

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

The investigation into a midair collision over Cerritos, Cal., leads to improvements in how planes are monitored. (Repeat).

When a turboprop stalls and crashes into a North Carolina forest, investigators resort to a risky test flight-and uncover an industry-wide safety problem. (Repeat).

Three crews experience the same devastating event, but with radically different outcomes when an engine falls off their commercial airplane. (Repeat).

Three horrific aviation disasters are all linked to breakdowns in vital security measures. (Repeat).

The Hawker Hurricane is spotlighted. Fast and versatile, the dogfighter doubles as a bomber and ground support aircraft in every theatre of the Second World War. (Repeat).

Lockheed's C-5 Galaxy transport aircraft stands out for its massive size and aid provided to the American military during war, but its peacetime contributions truly set it apart. (Repeat).

Inside stories of some of the most iconic military aircraft of the last 60+ years are shared. (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).

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

A sculptural new transportation hub for New York's World Trade Center is beset by challenges. Then, Amsterdam gains a striking building inspired by a mountain valley, and a new launchpad for space travel prepares for liftoff. (Repeat).