Defense Secretary Ash Carter greets Medal of Honor recipient, retired Army Capt. Florent A. Groberg, in his office before the Hall of Heroes induction ceremony at the Pentagon, Nov. 13, 2015. A day earlier, President Barack Obama presented the Medal of Honor to Groberg at the White House for courageous actions in Afghanistan. DoD photo by U.S. Army Sgt. 1st Class Clydell Kinchen
Air Force Tech. Sgt. James Heathcock, Staff Sgt. Josiah Crowell and Airman 1st Class Avery Putnam secure the exterior of the aircraft during anti-hijacking training as part of Southern Strike 16 at the Combat Readiness Training Center in Gulfport, Miss., Nov. 5, 2015. Heathcock, Crowell and Putnam are assigned to the New York Air National GuardÕs 186th Security Forces Squadron. New York Air National Guard photo by Staff Sgt. Christopher S. Muncy
Marine Corps Gen. Joseph F. Dunford Jr., chairman of the Joint Chiefs of Staff, cuts a cake commemorating the Marine Corps' birthday at the Boston Semper Fidelis Society Birthday Luncheon in Boston, Nov. 13, 2015. DoD photo by Navy Petty Officer 2nd Class Dominique A. Pineiro
DENVER, CO - NOVEMBER 15: Darian Stewart #26 of the Denver Broncos carries the French flag onto the field in honor of the victims of the recent terrorist attacks in Paris prior to the game between the Kansas City Chiefs and the Denver Broncos as US Military Appreciation Day is observed at Sports Authority Field at Mile High on November 15, 2015 in Denver, Colorado. The Chiefs defeated the Broncos 29-13. (Photo by Doug Pensinger/Getty Images)
U.S. Marines assigned to Weapons Company, Battalion Landing Team 2/6, 26th Marine Expeditionary Unit (MEU), conduct static fast-rope drills aboard the amphibious assault ship USS Kearsarge (LHD-3) in the North Red Sea, Nov. 3, 2015. The 26th Marine Expeditionary Unit is embarked on the Kearsarge Amphibious Ready Group and is deployed to maintain regional security in the U.S. 5th Fleet area of operations. (U.S. Marine Corps photo by Cpl. Jalen D. Phillips/ Released)
The guided missile destroyer USS Stethem (DDG 63) arrives at the Wusong military port in Shanghai on November 16, 2015. The ship is in Shanghai for a week. AFP PHOTO / JOHANNES EISELEJOHANNES EISELE/AFP/Getty Images
Navy Rear Adm. Cynthia M. Thebaud, right, commander Expeditionary Strike Group 2, greets a veteran during a Veterans Day ceremony outside the Intrepid Sea, Air and Space Museum Complex in New York, Nov. 11, 2015. U.S. Navy photo by Lt. Joseph Olivares
Midshipmen with the United States Naval Academy's Sprint football team rush out to the field at the Mexican Sedena Heroico Colegio Militar for an exhibition game with their Mexican counterparts in Mexico City, Mexico, Nov. 14, 2015. DoD photo by Lisa Ferdinando
U.S. 1st Marine Division, Alpha Company, 3D Amphibious Assault Battalion conducts their Amphibious Assault Vehicle qualifications tables 1-9 for the first time at Yuma Proving Grounds, Ariz., on Nov. 6, 2015. Alpha Company is conducting this training in preparation for future deployments. (U.S. Marine Corps photo taken by LCpl. AaronJames B. Vinculado/Released)
From left, Airman 1st Class Spencer Stone, US Army Specialist Alek Skarlatos, and Anthony Sadler, the three Americans who stopped a terrorist attack in August on a train in France, are honored during the Los Angeles Lakers and Detroit Pistons NBA basketball game at Staples Center November 15, 2015 in Los Angeles, California. AFP PHOTO / ROBYN BECKROBYN BECK/AFP/Getty Images
A U.S. Air National Guard firefighter assigned to the 180th Fighter Wing ascends a ladder during a regularly scheduled drill training exercise Nov. 7, 2015, in Swanton, Ohio, at a specialized training facility owned by the Toledo Fire Department. The 180th Fighter Wing partners with the Toledo Fire Department and other civil authorities to share resources and maximize training benefits. (U.S. Air National Guard photo by Staff Sgt. Shane Hughes/Released)