ATLANTIC OCEAN (April 21, 2021) Aviation Electronics Technician 3rd Class Ivette Morales, assigned to the Wasp-class amphibious assault ship USS Iwo Jima (LHD 7), dons an M50 gas mask in the ship's hangar bay during a simulated chemical and biological attack, April 21, 2021. Iwo Jima is operating in the Atlantic Ocean with Amphibious Squadron 4 and the 24th Marine Expeditionary Unit (24th MEU) as part of the Iwo Jima Amphibious Ready Group. (U.S. Navy photo by Mass Communication Specialist 2nd Class Joshua D. Petrosino)