Against a morning sky, a mushroom cloud spirals heavenward. A nuclear bomb has detonated in the heart of Washington D.C., incinerating 15,000 residents in just 15 seconds. More than 50% of the population living within a 1/2 mile radius of the explosion is either dead or severely injured. The next 24 hours will determine whether the rest of the city lives or dies. To survive this horrific ordeal they will need a plan. And lucky for us--there is one. But will it work? For the first time on television, the Department of Homeland Security reveals the most detailed and comprehensive plan to save America should terrorists go nuclear. This chilling two-hour special delves into the complex and highly secretive world of disaster planning.

Though nuclear weapons still threaten world security, the weapons most feared today are chemical and biological--drifting clouds of death that engulf victims, causing death too horrible to describe.

The oil that our world runs on won't last forever. The gap between supply and demand is ever increasing. Will alternative energy save us or is it already too late?

Clues to human extinction are discovered in the Dinosaur's apocalypse.

Does a remote island in the middle of the Pacific Ocean hold the final clue to the Mayan's apocalyptic predictions concerning 2012? One explorer thinks he's discovered the answers that have eluded man for centuries.

Against a morning sky, a mushroom cloud spirals heavenward. A nuclear bomb has detonated in the heart of Washington D.C., incinerating 15,000 residents in just 15 seconds. More than 50% of the population living within a 1/2 mile radius of the explosion is either dead or severely injured. The next 24 hours will determine whether the rest of the city lives or dies. To survive this horrific ordeal they will need a plan. And lucky for us--there is one. But will it work? For the first time on television, the Department of Homeland Security reveals the most detailed and comprehensive plan to save America should terrorists go nuclear. This chilling two-hour special delves into the complex and highly secretive world of disaster planning.

Though nuclear weapons still threaten world security, the weapons most feared today are chemical and biological--drifting clouds of death that engulf victims, causing death too horrible to describe.

The oil that our world runs on won't last forever. The gap between supply and demand is ever increasing. Will alternative energy save us or is it already too late?

Clues to human extinction are discovered in the Dinosaur's apocalypse.

Does a remote island in the middle of the Pacific Ocean hold the final clue to the Mayan's apocalyptic predictions concerning 2012? One explorer thinks he's discovered the answers that have eluded man for centuries.

Against a morning sky, a mushroom cloud spirals heavenward. A nuclear bomb has detonated in the heart of Washington D.C., incinerating 15,000 residents in just 15 seconds. More than 50% of the population living within a 1/2 mile radius of the explosion is either dead or severely injured. The next 24 hours will determine whether the rest of the city lives or dies. To survive this horrific ordeal they will need a plan. And lucky for us--there is one. But will it work? For the first time on television, the Department of Homeland Security reveals the most detailed and comprehensive plan to save America should terrorists go nuclear. This chilling two-hour special delves into the complex and highly secretive world of disaster planning.

The oil that our world runs on won't last forever. The gap between supply and demand is ever increasing. Will alternative energy save us or is it already too late?

Clues to human extinction are discovered in the Dinosaur's apocalypse.

Does a remote island in the middle of the Pacific Ocean hold the final clue to the Mayan's apocalyptic predictions concerning 2012? One explorer thinks he's discovered the answers that have eluded man for centuries.