Investigators probing the deadly crash of Air France flight 447 over the Atlantic are running out of time to find the flight data recorders which could prove crucial to working out what caused the disaster. Although some debris and 50 bodies have been retrieved, air crash investigators remain in the dark about what caused the airliner to plunge into the sea off the coast of Brazil killing the 228 people onboard on June 1. The wreckage is believed to be about 15,000 feet (4,500 meters) deep, amid underwater mountains and mixed in with tons of sea trash
