University of Southern California students "duck and cover" during a mock earthquake drill Thursday Oct. 15, 2009 in Los Angeles. School children took shelter under work tables along with scientists and government officials as California practiced how to survive a major earthquake. AP Photo logo AP Photo 1 month ago

University of Southern California students "duck and cover" during a mock earthquake drill Thursday Oct. 15, 2009 in Los Angeles. School children took shelter under work tables along with scientists and government officials as California practiced how to survive a major earthquake.