** FILE ** In this Jan. 17, 1994, file photo, the covered body of Los Angeles motorcycle officer Clarence W. Dean lays near his motorcycle which plunged off Highway 14 overpass that collapsed onto Interstate 5 in the San Fernando Valley section of Los Angeles. In a joint publication, to be released Thursday, May 22, 2008, of the U.S. Geological Survey and California Geological Survey, scientists for the first time have written a script detailing the devastation California would likely face if it were rocked by a monstrous 7.8-magnitude earthquake. (AP Photo/Doug Pizac)