mystery about how four cannot work. failed to send the signal. >> elt is emergency locator transmitter. they transmit a signal to satellites when they hit water. they didn't here. now it's going to fuel a new round of conspiracy here that the plane is in a hangar somewhere. but all it is an exactitude to follow up. it's horrible. we don't know what it means. once again, troubling that these devices did not indicate what it they're supposed to do if the plane hit the water. mary, david, thank you very much. kate? coming up on "new day," more on the flight 370 mystery. we've mentioned that the plane had four special beacons i guess you could call them, designed to send signals after the crash. why didn't any of them work? we're going to continue to explore that. >> and then on "inside politics," we'll go to kansas as high school students are against michelle obama as high school