Searchers race to find jet; no new signals heard

A U.S. Navy P-8 Poseidon takes off from Perth Airport on route to rejoin the on-going search operations for the missing Malaysia Airlines Flight 370 in Perth, Australia, Thursday, April 10, 2014. Planes and ships hunting for the missing Malaysian jetliner zeroed in on a targeted patch of the Indian Ocean on Thursday, after a navy ship picked up underwater signals that are consistent with a plane's black box. (AP Photo/Rob Griffith)