Chamber Training A Marine clears his mask during gas chamber training at Marine Corps Air Station Futenma in Okinawa, Japan, July 26, 2018. Marine Corps photo by Cpl. Andy O. Martinez SHARE IMAGE: Download Image: Full Size (2.02 MB) Tags: Japan, Japan, Marine Corps, Marines Photo By: Cpl. Andy Martinez VIRIN: 180726-M-MI258-074C.JPG Photo Gallery