CNN The Lead With Jake Tapper April 8, 2014 20:20:00
Port, starbird, left, right along the ship. so it's very difficult to determine an exact location. >> now fred, the australian ship with the u.s. naval equipment went back, tried to retrace the route where they heard the pingers. they did not pick anything up. is it possible that the pingers are still transponding even though they weren't picked up the second time -- or the third time, actually, i should say? >> from what i understand, the first time that they did receive the pings was for a period of over two hours, which is pretty promising. but the -- then they -- what they would do is run ...