FILE - White suited workers investigate the crash scene of a Marine Corps MV-22 Osprey at the Avra Valley Airport, north of Tucson, Ariz., April 9, 2000. A Marine Corps aircraft attempting to land during a nighttime training mission crashed and burst into flames, killing all 19 aboard and adding to a checkered history for a new breed of hybrid plane that can take off and land like a helicopter. (AP Photo/Jon Hayt, File)