WASHINGTON (AP) — Japan has grounded its fleet of V-22 Osprey aircraft again after an incident last Sunday where one of the hybrid helicopter-aircraft tilted unexpectedly and hit the ground while trying to take off. The V-22 was taking part in the joint U.S. military exercise Keen Sword and carrying 16 passengers, including three U.S. service members. During takeoff it “became unstable as it swayed from side to side, and the left wing, the lower part of the aircraft came into contact with the