Brady Rusk, 12, hugs Eli at a retirement and adoption ceremony at Lackland Air Force Base, Texas, Feb. 3. The bomb-sniffing Labrador retriever was assigned to Brady's older brother, Marine Pfc. Colton Rusk, 20, who was killed in action in Afghanistan by Taliban sniper fire Dec. 5. The Department of Defense granted the Rusk's permission to adopt Eli and allow him to join their family. (U.S. Air Force photo by Tech. Sgt. Bennie J. Davis III)

Marine and Navy SEAL sniper students trudge by a mud puddle during a stalking lane Feb. 9 at a remote training area near an inactive shipyard at Joint Base Pearl Harbor - Hickam. The students are in the Scout Sniper School, School of Infantry —€” West, Detachment Hawaii based at MCB Hawaii. (U.S. Marine Corps photo by Cpl. Tyler Main)

From left, crew chief Cpl. Matthew Adams, 20, from South Hampton, N.J.; driver Lance Cpl. Devon Ridgway, 22, from Boise, Idaho, and Pfc. Andrey Fortygin, 20, from Rochester, N.Y., all serving with 3rd Assault Amphibian Battalion, 1st Marine Division, land on a beach at Camp Pendleton, Calif., in their amphibious assault vehicle Feb. 28 while participating in a bilateral training exercise with various Marine units from Southern California and more than 180 soldiers of the Japanese Ground Self-Defense Force. (U.S. Marine Corps photo by Gunnery Sgt. Scott Dunn)

Marines conduct routine maintenance on helicopters assigned to the "Evil Eyes" of Marine Medium Squadron (HMM) 163 aboard the amphibious assault ship USS Boxer (LHD 4). Boxer and the 13th Marine Expeditionary Unit (13th MEU) are underway on a scheduled deployment to the western Pacific region. (U.S. Navy photo by Petty Officer 3rd Class Trevor Welsh)

A Marine with the 31st Marine Expeditionary Unit's Maritime Raid Force, participates in fast rope sustainment training Feb. 4. The training helps to ensure the MEU's ability to remain always ready to respond to any contingency operation throughout the Asia-Pacific region. (U.S. Marine Corps photo by Lance Cpl. Garry J. Welch)