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Disasters

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Asteroid

Asteroid (Oct. 2006)

Will a doomsday rock the size of the Rose Bowl hit Earth in 2036? Watch now (12 mins.)

Hurricane Katrina

Hurricane Katrina (Oct. 2005)

Scientists' warnings proved sadly prescient about New Orleans' risk from hurricanes. Watch now (4 mins.)

Hurricanes

Hurricanes (Jan. 2005)

Predicting a hurricane's intensity is notoriously difficult, but new tools may make it easier. Watch now (12 mins.)

Mass Extinction

Mass Extinction (Nov. 2006)

What caused the mother of all extinctions 250 million years ago? Watch now (13 mins.)

Mt. St. Helens: Back From the Dead

Mt. St. Helens: Back From the Dead (May. 2010)

Thirty years after the massive eruption, could it happen again? Watch now (50 mins.)

The Spy Factory

The Spy Factory (Feb. 2009)

Examine the high-tech eavesdropping carried out by the National Security Agency and the pitfalls of surveillance in an age of terrorism. Watch now (50 mins.)

Storm That Drowned a City

Storm That Drowned a City (Nov. 2005)

Experts and eyewitnesses reconstruct the devastating floods that Hurricane Katrina unleashed on New Orleans. Watch now (49 mins.)

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