The military announced late Wednesday it was grounding all of its Osprey V-22 helicopters, one week after eight Air Force Special Operations Command service members died in a crash off the coast of Japan.
The Air Force, Navy, and Marine Corps took the extraordinary step of grounding hundreds of aircraft after a preliminary investigation of last week's crash indicated that a material failure – that something went wrong with the aircraft – and not a mistake by the crew led to the deaths.
