the u.s. navy tweeted this sound of a pinger. once an approximate location of the wreckage is found, the device will be lowered into the sea to listen to pings from the flight recorder. it sounds something like this. the device will not reach the area until april 5th, three days before the battery in the device will likely go dead. the malaysian transportation secretary praised the international teams aiding in this investigation. >> with such strong cooperation from our international partners, the challenge is no longer diplomatic. it is now primarily technical and logistical. >> joining me now is pentagon press secretary. thank you for taking the time. >> thanks, jim. glad to be here. >> appreciate it. >> a lot of frustration over the last 18, 19 days. are we, the team, is the