The U.S. forces on Friday lifted a worldwide flight ban on its Osprey military aircraft, which had been grounded after a deadly crash off a southwestern Japan island in November, but stopped short of giving details on the cause of the accident.The U.S. Naval Air Systems Command said in a press release that it is "issuing a flight clearance" for the tilt-rotor aircraft, saying the decision was based on "a meticulous and data-driven approach prioritizing the safety of our aircrews."Tokyo and Washington are coordinating the exact schedule for the resumption of flights by Ospreys deployed in Ja…READ FULL ARTICLE