It's a dog's life! Marine Corporal Zack Barkley prepares to fire his M4 carbine during a live-fire exercise on the deck of the USS Iwo Jima (LHD-7) on 4 March 2018. The Marine Corps did not release the name of Corporal Barkley's best friend, but we approve of the canine's use of ear and eye protection.
(U.S. Navy photo by Mass Communications Specialist 3rd Class Daniel C. Coxwest, U.S. Navy)