Maryland Company's Technology Instrumental in Plane Search

Australian and U.S. navy officials say they've detected more acoustic signals that may belong to a black box from the missing Malaysia Airlines jet. The airliner's location can't be confirmed until wreckage from flight MH370 is located. The best clues have been picked up by a U.S. Navy black box detector being towed by an Australian naval ship more than 1,500 kilometers northwest of Perth, Australia. VOA’s Carolyn Presutti spent time with the pinger locator's manufacturer.