U.S. Marines with Medium Marine Tiltrotor Squadron 264, 22nd Marine Expeditionary Unit (MEU) fires stinger simulation rounds aboard the USS Wasp (LHD-1) on April 17, 2016. The 22nd MEU and Amphibious Squadron Six (PHIBRON-6) are underway for Amphibious Ready Group (ARG)/ MEU Exercise. (Official photo by Cpl. Ryan G. Coleman / 22nd Marine Expeditionary Unit / Released)