Search For Flight 370 Goes Underwater

(Undated) -- Crews are going underwater in the search for missing Malaysia Air Flight 370. Searchers in the Indian Ocean are using a giant underwater microphone that listens for pings from the plane's flight data recorders. They're also using an underwater robot that scans the ocean floor for signs of wreckage.Malaysia Airlines Flight 370 vanished on March 8th on a flight from Kuala Lumpur to Beijing.