170601-N-ZK016-0031 MAYPORT, Fla. (June 1, 2017) Sailors assigned to the amphibious assault ship USS Iwo Jima (LHD 7) perform knee-blockers during command physical training at Naval Station Mayport. Iwo Jima recently returned from routine operations and an ammunition onload in preparation for an upcoming deployment. (U.S. Navy photo by Mass Communication Specialist Seaman Joe J. Cardona Gonzalez/Released)