PERSIAN GULF (April 13, 2008) Aviation Warfare Systems Operator 2nd Class Joseph Poswilko grasps Aviation Warfare Systems Operator 3rd Class John McCracken as they are hoisted into an MH-60S Seahawk at the end of search and rescue (SAR) swimmer training in the Persian Gulf. Poswilko and McCracken are assigned to the "Blackjacks" of Helicopter Sea Combat Squadron (HSC) 21, which is deployed aboard the amphibious assault ship USS Tarawa (LHA 1). The Tarawa Expeditionary Strike Group is conducting exercises in the U.S. 5th Fleet area of responsibility. U.S. Navy photo by Mass Communication Specialist Seaman David A. Brandenburg (Released)