Australia 's deputy PM defends searching the southern Indian Ocean . The joint search agency says the original search area is not plane 's final resting place . U.S. Navy official : " We have a lot of work to do, and we're going to continue working on it until we find what happened here. Unlikely to be from Flight 370 . " The pings had been at the center of the search since they were picked up weeks ago .
Australia 's deputy PM defends searching the southern Indian Ocean . The joint search agency says the original search area is not plane 's final resting place . U.S. Navy official : " We have a lot of work to do, and we're going to continue working on it until we find what happened here. " The pings had been at the center of the search since they were picked up weeks ago .