171030-N-FG807-006 GETTYSBURG, Pa. (Oct. 30, 2017) Sailors assigned to the aircraft carrier USS Dwight D. Eisenhower (CVN 69)(Ike) participate in a guided tour of the Dwight D. Eisenhower National Historic Site. Ike is undergoing a Planned Incremental Availability (PIA) at Norfolk Naval Shipyard during the maintenance phase of the Optimized Fleet Response Plan (OFRP). (U.S. Navy photo by Mass Communication Specialist 3rd Class Devin Alexondra Lowe/Released)