A U.S. Air Force's F-22 Raptor jet takes off at Kadena U.S. Air Force Base on Japan's southwestern island of Okinawa June 15, 2009. REUTERS/Yuriko Nakao

A U.S. Air Force’s F-22 Raptor jet takes off at Kadena U.S. Air Force Base on Japan’s southwestern island of Okinawa June 15, 2009. REUTERS/Yuriko Nakao

A US Air Force F-22 Raptor jet takes off at Kadena USAF Base on the Japanese island of Okinawa on June 15, 2009. Reuters / Yuriko Nakao

June 6, 2016 3:10 PM (UTC+8)