The U.S. military announced yesterday (Dec. 6) that all V-22 Osprey tiltrotors are grounded as a result of the preliminary investigation into the U.S. Air Force aircraft that crashed off the coast of Japan last week, killing all eight crew members. Investigators found evidence of material failure in the debris recovered from the water. In … Continue reading U.S. Military Grounds All Services’ V-22 Ospreys