1. An Air Force C-17 Globemaster III aircraft lands during Exercise Global Medic and Warrior Exercise on Schoonover Airfield, Fort Hunter Liggett, Calif., June 22, 2012.

2.A launcher fires a Standard Missile 2 during a live-fire exercise aboard the USS Oscar Austin while under way in the Atlantic Ocean, March 21, 2012.

3.F-16 Fighting Falcons demonstrate an 'Elephant Walk' as they taxi down the flightline at Kunsan Air Base, South Korea, Dec. 14, 2012.

4. KC-135 Stratotanker Elephant Walk

5. INTERNATIONAL REPLENISHMENT Military Sealift Command's USNS Bridge supplies fuel to the German FGS Hamburg with the USS Hue City astern during a replenishment at sea in the Arabian Sea, March 23, 2013. The Hamburg, along with the USS Eisenhower, are deployed to the U.S. 5th Fleet area of responsibility, U.S. Navy photo by Petty Officer 2nd Class Ryan D. McLearnon

6. Navy pilots assigned to the Blue Angels, the Navy's flight demonstration squadron, fly in a Delta formation over Zion National Park near St. George, Utah, March 14, 2012.

7. Battleship Iowa

8. SNOW PATROL Air Force maintainers remove snow from a C-17 Globemaster III on Joint Base Elmendorf-Richardson, Alaska, Jan. 12, 2012.

9. An F/A-18F Super Hornet, top, with pilots U.S. Navy Lt. Cmdr. Warren Tomlinson and Lt. j.g. Josh Raymond; an F/A-18E Super Hornet with pilot Navy Lt. Daniel Solfelt; an F/A-18C Hornet with pilot Navy Cmdr. Craig Sicola; and an F/A-18C Hornet with pilot Navy Lt. Taylor Hesse fly over the aircraft carrier USS Carl Vinson under way in the Arabian Gulf, Feb. 25, 2012. U.S.

10. OSPREY LANDING An MV-22 Osprey prepares to land on the flight deck of the aircraft carrier USS George H.W. Bush, which is conducting training and carrier qualifications, in the Atlantic Ocean, Jan. 27, 2013.

11. An F/A-18C Hornet takes off from the flight deck of the USS Carl Vinson while conducting carrier qualifications in the Pacific Ocean, Dec. 1, 2011.

12. U.S. soldiers from launch a round downrange during a live-fire exercise on Grafenwoehr Training Area, Germany, Nov. 30, 2011.

13. The USS Pearl Harbor, front, the USS Makin Island, center, and the USS New Orleans transit off the coast of Southern California in the Pacific Ocean, Oct. 10, 2011. The Makin Island Amphibious Ready Group is under way for a certification exercise preparing for an upcoming deployment.

14. A landing craft air cushion departs the USS Makin Island in the Pacific Ocean, Oct. 11, 2011. The Makin Island is under way for a certification exercise preparing for the ship’s upcoming maiden deployment.

15. Army paratroopers make a static line jump over Edwards Air Force Base about 100 miles north of Los Angeles, Sept. 11, 2011. U.S.

16. Death Angel

17. The guided-missile destroyer USS Stockdale, left, the guided-missile cruiser USS Bunker Hill and the guided-missile destroyer USS Halsey are under way in the Pacific Ocean, Sept. 21, 2011

18. Army paratroopers fire their 105mm howitzer during a training exercise on Fort Bragg, N.C., July 31, 2011.

20. Airmen load a tank into a C-5M Super Galaxy Nov. 15, 2011, at Dover Air Force Base, Del. The C-5M is the upgraded version of the C-5 Galaxy and has a 30 percent shorter take off roll, 58 percent faster climb rate and allows significantly more cargo to be carried over longer distances.

21. Army Rangers fire a Carl Gustav 84mm recoilless rifle during live-fire training at a range on Camp Roberts, Calif., Jan. 26, 2014.

22. Marines fire an M777A2 howitzer during Steel Knight 2014 on Marine Corps Air Ground Combat Center Twentynine Palms, Calif., Dec. 14, 2013

23. U.S. sailors transit the Arabian Gulf aboard a riverine command boat during a training exercise, Jan. 21, 2014.