180321-N-MU198-128 ATLANTIC OCEAN (Mar. 21, 2017) Sailors simulate patching a pipe during a damage control exercise aboard the Arleigh Burke-class guided-missile destroyer USS Mitscher (DDG 57). Mitscher is underway participating in the Carrier Strike Group Four task force exercise in preparation for an upcoming deployment. (U.S. Navy photo by Mass Communication Specialist 3rd Class Danny Ray Nuñez Jr./Released)