A member of the Japan Ground Self-Defense Force, 30th Infantry Regiment, 12th Brigade, Eastern Army practices fast roping out of an MV-22B Osprey tiltrotor aircraft during Forest Light 17-1 at Camp Soumagahara, Japan, on March 9, 2017. Forest Light is a routine, semi-annual exercise conducted by U.S. and Japan forces in order to strengthen our interoperability and combined capabilities in defense of the U.S.-Japan alliance. - A member of the Japan Ground Self-Defense Force, 30th Infantry Regiment, 12th Brigade, Eastern Army practices fast roping out of an MV-22B Osprey tiltrotor aircraft during Forest Light 17-1 at Camp Soumagahara, Japan, on March 9, 2017. Forest Light is a routine, semi-annual exercise conducted by U.S. and Japan forces in order to strengthen our interoperability and combined capabilities in defense of the U.S.-Japan alliance.