Friday

The Pentagon - the name alone conjurs up an imposing image of American power. Completed in 1943, this five-sided nerve center for the nation's armed services is the largest office building in the world - yet it takes only seven minutes to walk between any two points in the building because of its unique shape. Walk along its more than 17 miles of corridors with the 24,000 men and women who come here every day to work on the vital and often top-secret business of national defense. After three years of hard work, wedge one was five days from completion when it took a direct hit from the terrorist hijacked airliner on September 11, 2001. The Pentagon's remarkable resilence is directly attributable to improvements made during the renovation.

In Botswana’s Okavango Delta, deadly predators look tame next to the aggressive and territorial hippopotamus. After Dave and Cody trudge through hippo-infested marshland using only a GPS and binoculars, they set their sites on a homemade grass boat.

A tough, rough-talking and self-reliant band of brothers battles long hours and harsh conditions deep in the woods of northern Maine, ferrying huge pieces of timber along an unpaved road in massive trucks. This show offers an unvarnished look at the Pelletier family business and its second- and third-generation operators, who treat their employees like family and do their utmost to fill their quotas and meet their deadlines.

After two veteran truckers give up and head home, Hugh Rowland and Lisa Kelly are forced to take on the Death Road without spotters. Lisa moves to the Southern Death Road, where she faces her biggest challenge so far - alone. The rookie team of Tim and Tino have to navigate treacherous cliffs as well as tight fits in town, where navigating around cars and buildings may prove as challenging as dodging landslides, all to get their load to a community in need.

Producer Bruce Nash ("Most Shocking") is behind this adrenaline-fueled series that features civilians and law enforcement officers in risky, selfless rescue missions. Each one-hour episode presents an account of a rescue effort from the dual perspectives of hero and victim.

Buyers in the Atlanta area searching for those one-of-a-kind items -- a vampire hunting kit, anyone? -- know exactly where to go, but the quantity is always limited and the prices fluid. "Auction Kings" follows the action at Gallery 63, a storied auction house in Hotlanta with a reputation for selling both bizarre and high-end items. Its owner, Paul Brown, manages his feisty staff and mingles with his customers, bidders and buyers who come from all walks of life.

Buyers in the Atlanta area searching for those one-of-a-kind items -- a vampire hunting kit, anyone? -- know exactly where to go, but the quantity is always limited and the prices fluid. "Auction Kings" follows the action at Gallery 63, a storied auction house in Hotlanta with a reputation for selling both bizarre and high-end items. Its owner, Paul Brown, manages his feisty staff and mingles with his customers, bidders and buyers who come from all walks of life.

Each episode contains an event in history that has never been conclusively solved. In every episode, a team of scientists tries to solve the case.

From colossal devices designed to save the world to mind-expanding, world-shrinking machines, we trace the evolution of mice and menus. Learn about the world's most powerful computer, IBM's ASCI White, that operates at 12-trillion calculations a second. See how the first room-sized computers such as ENIAC, changed the world. Bite into Apple's history, the machine that made computers a household appliance. And peer through a microscope to see the molecular computers of the future.

The Pentagon - the name alone conjurs up an imposing image of American power. Completed in 1943, this five-sided nerve center for the nation's armed services is the largest office building in the world - yet it takes only seven minutes to walk between any two points in the building because of its unique shape. Walk along its more than 17 miles of corridors with the 24,000 men and women who come here every day to work on the vital and often top-secret business of national defense. After three years of hard work, wedge one was five days from completion when it took a direct hit from the terrorist hijacked airliner on September 11, 2001. The Pentagon's remarkable resilence is directly attributable to improvements made during the renovation.

In Botswana’s Okavango Delta, deadly predators look tame next to the aggressive and territorial hippopotamus. After Dave and Cody trudge through hippo-infested marshland using only a GPS and binoculars, they set their sites on a homemade grass boat.

A tough, rough-talking and self-reliant band of brothers battles long hours and harsh conditions deep in the woods of northern Maine, ferrying huge pieces of timber along an unpaved road in massive trucks. This show offers an unvarnished look at the Pelletier family business and its second- and third-generation operators, who treat their employees like family and do their utmost to fill their quotas and meet their deadlines.

After two veteran truckers give up and head home, Hugh Rowland and Lisa Kelly are forced to take on the Death Road without spotters. Lisa moves to the Southern Death Road, where she faces her biggest challenge so far - alone. The rookie team of Tim and Tino have to navigate treacherous cliffs as well as tight fits in town, where navigating around cars and buildings may prove as challenging as dodging landslides, all to get their load to a community in need.