March 2, 2009 10:32 am The Search for Killer Asteroids Bay Area astronomers police the skies for earth killing asteroids. US & World Videos 3:23 UC Davis finds brain sizes are growing 3:36 Waymo expands driverless taxi service 5:21 A closer look: 2 police officers shot, injured in San Jose 1:26 Pursuit standoff ends in the North Bay 2:40 Pro-Palestinian protests continue at UC Berkeley