Hiroshima. Nagasaki. Mercury, Nevada? The latter was the site for the testing of 928 large-scale nuclear weapons from 1951 to 1992. Martin Sheen narrates this harrowing exposé of the United States' disregard for everyone living downwind.

Follow a team of international scientists documenting an archeological sensation: the exploration of royal tombs beneath the ancient Mexican city of Teotihuacǹ. Not much is known about this long-lost society. When archeologists discover evidence of a sacrificial chamber beneath the famous Pyramid of the Feathered Serpent, they find the clues that may finally tell us who these mysterious people were.