U.S. sailors train with the LA9/P laser hail and warning system on the fantail of the USS Harry S. Truman in the Atlantic Ocean, Nov. 28, 2015. U.S. Navy photo by Petty Officer 3rd Class J.R. Pacheco Army 1st Sgt. Ricardo Gutierrez low-crawls under a wire obstacle during the assessment phase of the Best Ranger competition on Fort Jackson, S.C., Nov. 24, 2015. Gutierrez is one of three Fort Jackson soldiers fighting for a position on a two-soldier team that will represent the post during the 33rd annual competition on Fort Benning, Ga., in April 2016. U.S. Army photo by Sgt. 1st Class Brian Hamilton A KC-135 Stratotanker refuels an F-15E Strike Eagle over the northern Mediterranean Sea, Nov. 12, 2015. Both aircraft are supporting Operation Inherent Resolve while deployed to Incirlik Air Base, Turkey. U.S. Air Force photo by Senior Airman Kate Thornton Marine Corps Capt. Ericka Johnson conducts egress training on the Quantico Reserve Support Unit Humvee Egress Assistance Trainer on Marine Corps Base Quantico, Va., Nov. 20, 2015. The training replicates the effort required to exit an overturned vehicle. Johnson is a Legal Service Support Section defense attorney. U.S. Marine Corps photo Coast Guard Petty Officer 1st Class Daryk Brekke unloads toys from an MH-65 Dolphin helicopter at Kalaeloa Airport on Oahu, Hawaii, Nov. 29, 2015. As part of the Toys for Tots program, Coast Guardsmen collected toys and donations to give to Marines for delivery to disadvantaged children for Christmas. U.S. Coast Guard photo by Petty Officer 2nd Class Tara Molle U.S. sailors conduct small boat operations in the Mediterranean Sea, Nov. 30, 2015. U.S. Navy photo by Petty Officer 2nd Class Justin Stumberg A U.S. Army paratrooper conducts training with an M249 light machine gun at a training area near Ravenna, Italy, Nov 30, 2015. The soldier is assigned to Company C, 1st Battalion, 503rd Infantry Regiment, 173rd Airborne Brigade. U.S. Army photo by Elena Baladelli Air Force Staff Sgt. Justin Gonzalez carries military working dog Rango on Luke Air Force Base, Ariz., Nov. 18, 2015. Gonzalez is a military working dog handler with the 56th Security Forces Squadron. Military dog handlers train to make sure they can carry both a full ruck sack and their dog in the event of an injury or if the dog becomes too tired to move. U.S. Air Force photo by Senior Airman James Hensley U.S. Marine Corps Cpl. Taylor Giffard role-plays as an opposition force member during a mission readiness exercise for the 1st Battalion, 7th Marine Regiment at an undisclosed location in Southwest Asia, Nov. 24, 2015. U.S. Marine Corps photo by Sgt. Owen Kimbrel A rescue swimmer from Air Station Savannah is hoisted from a Station Charleston 45-foot Response Boat - Medium in the Cooper River near Charleston, S.C., Nov. 16, 2015. Coast Guard air crews routinely train with small-boat crews in practicing hoists and rescue basket deliveries. U.S. Coast Guard photo by Petty Officer 3rd Class David Weydert A C-1 Trader aircraft on the flight deck of the attack aircraft carrier USS AMERICA (CVA-66). The prototype to the Trader, the Grumman XS2F-1 "Tracker" first flew on December 4, 1952. In 1988, it was retired from service due to the fire hazard created by storing its high-octane fuel aboard ship. USN Photo U.S. Army Capt. John Dills shakes hands with a boy during a medical readiness training exercise in San Jose De Rio Pinto, Honduras, Nov. 12, 2015. U.S. Air Force Photo by Senior Airman Westin Warburton Marines wait to be lifted from the ground as they conduct insertion and extraction rigging training on Camp Pendleton, Calif., Nov. 19, 2015. U.S. Marine Corps photo by Cpl. Briauna Birl Air Force 1st Lt. Steven Strickland sits in the copilot seat during an air refueling mission over Oregon, Nov. 16, 2015. U.S. Air Force photo by Airman 1st Class Sean Campbell An F/A-18C Hornet assigned to the Wildcats of Strike Fighter Squadron 131 takes off from the flight deck of the aircraft carrier USS Dwight D. Eisenhower in the Atlantic Ocean, Nov. 27, 2015. U.S. Navy photo by Petty Officer 3rd Class J. Alexander Delgado Army paratroopers descend to the ground at the Sicily drop zone on Fort Bragg, N.C., Nov. 21, 2015. U.S. Army photo by Staff Sgt. Charles Crail U.S. sailors spray the flight deck with a cleaning foam aboard the U.S. Navy's only forward-deployed aircraft carrier USS Ronald Reagan in the waters south of Japan, Nov. 27, 2015. The carrier and its embarked air wing, Carrier Air Wing 5, provide a combat-ready force that protects and defends the collective maritime interests of the U.S. and its allies and partners in the Indo-Asia-Pacific region. U.S. Navy photo by Petty Officer 3rd Class Ryan McFarlane U.S. Marines jump off the side of the USS Essex during a swim call in the South China Sea, Nov. 15, 2015. The Marines are assigned to the 15th Marine Expeditionary Unit. U.S. Marine Corps photo by Cpl. Elize McKelvey Navy Petty Officer 1st Class Christopher Marsh, left, and Petty Officer 3rd Class Phillip Botts conduct a corrosion inspection on an E-2C Hawkeye in the hangar bay of the USS Dwight D. Eisenhower in the Atlantic Ocean, Nov. 25, 2015. U.S. Navy photo by Petty Officer Seaman Anderson W. Branch Alisa Deuermeyer, a volunteer at Joint Base Langley-Eustis, Va., laughs as U.S. Air Force Master Sgt. Scott Fridinger, additional duty first sergeant assigned to the Air Combat Command Communications Support Squadron, performs a card trick at Langley Air Force Base, Va., Oct. 21, 2015. U.S. Air Force photo by Senior Airman Aubrey White The Ronald Reagan Carrier Strike Group steams in formation with Japan Maritime Self-Defense Force ships during an exercise in the Pacific Ocean, Nov. 23, 2015. U.S. Navy photo by Petty Officer 3rd Class Nathan Burke