CNN CNN Newsroom March 31, 2014 14:49:00
Of dissent? >> it is a very gradual dissent. the horizon is very normal. the design of the aircraft is meant to fly, even without fuel and without anyone at the controls. >> all right, martin savidge, mitchell casado, many thanks to you. >> they are just days to help locate the black boxes with the pinging noise. the u.s. navy has a high-deck device that may help narrow the search. brian todd is in washington to explain how that works. >> this device is called the towed pinger locator. it is made by phoenix international. this video you just showed was of our visit to phoenix