US Air Force. Courtesy of Staff Sargeant Andrew Lee. 

NORTH POLE (July 30, 2015) Sailors aboard the fast attack submarine USS Seawolf (SSN 21) remove arctic ice from the hull after surfacing in the North Pole July 30, 2015. Seawolf, homeported in Bangor, Washington, is conducting naval operations in the U.S. 6th Fleet area of operations in support of U.S. national security interests in Europe. (U.S. Navy photo/Released)

A Rockwell B-1 Lancer flies over the Norma Brown building during the 75th Diamond Anniversary ceremony on Goodfellow Air Force Base, Texas, Jan. 26, 2016. The B-1 flew over after a Vultee BT-15 Valient flew over. Both were symbolic; the vintage BT-15 representing the planes that Goodfellow pilots trained on, and the B-1 representing the intelligence support training the base now provides. (U.S. Air Force photo by Senior Airman Scott Jackson/Released).

A U.S. Air Force F-15E Strike Eagle fighter aircraft is illuminated by a lightning storm near Bagram Air Field, Afghanistan, Oct. 6, 2011. (U.S. Air Force Photo by Tech. Sgt. Matt Hecht).

Logistics Specialist 3rd Class Frederick Beltran, assigned to the guided-missile destroyer USS Ramage (DDG 61), reaches for the national ensign as the ship shifts colors during the ship’s departure from Haifa, Israel. Ramage is on a scheduled deployment supporting maritime security operations and theater security cooperation efforts in the U.S. 6th Fleet area of responsibility. (U.S. Navy photo by Mass Communication Specialist 2nd Class Jared King/Released)

A U.S. Marine crew member aboard a CH-46E Sea Knight from Marine Medium Helicopter Squadron 364 (HMM-364) takes in the view during a flight along the coast of Chile as part of Partnership of the Americas (POA) 2014. Representatives from Argentina, Brazil, Canada, Chile, Colombia, Mexico, Paraguay and the United States are participating in POA 2014 from Aug. 11-22, 2014. This exercise is designed to enhance joint and combined interoperability, increase the combined capability to execute Amphibious Operations, Peace Support Operations and Humanitarian Assistance/Disaster Relief missions and further develop strong and lasting relationships the U.S. Marine Corps has established with Partner Nations naval infantries/marine corps. (U.S. Navy photo by Mass Communication Specialist 1st Class Paul Seeber/Released) 

U.S. Marine Corps Gen. James F. Amos, the outgoing commandant of the Marine Corps, salutes the colors during the passage of command ceremony at Marine Barracks Washington in Washington, D.C., Oct. 17, 2014. Amos relinquished command of the Marine Corps to Gen. Joseph F. Dunford Jr. and retired after 44 years of military service. (DoD photo by Petty Officer 2nd Class Patrick Kelley, U.S. Coast Guard/Released)

PACIFIC OCEAN (Dec. 15, 2014) Sailors assigned to Helicopter Maritime Strike Squadron (HSM) 35, Detachment 1, prepare an MQ-8B Fire Scout unmanned aircraft system for stowage on the flight deck of the littoral combat ship USS Fort Worth (LCS 3). Currently on a 16-month rotational deployment in support of the Asia-Pacific rebalance, Fort Worth is a fast and agile warship tailor-made to patrol the region’s littorals and work hull-to-hull with partner navies, providing 7th Fleet with the flexible capabilities it needs now and in the future. (U.S. Navy photo by Mass Communication Specialist 2nd Class Antonio P. Turretto Ramos/Released)

CAMP ROBERTS, Calif. (May 13, 2015) Chief Operations Specialist Richard Baker, a student of the Scan Eagle unmanned aerial vehicle training course, carries a UAV to the launcher. The eight-week course teaches students how to operate Scan Eagles and consists of classroom instruction and practical application. (U.S. Navy photo by Mass Communication Specialist Seaman Richard A. Miller/Released

JACKSONVILLE, Fla. (Aug. 31, 2012) Lt. Stephen Bruner and Lt. Cmdr. John Currie man the flight simulator at the Naval AIr Station Jacksonville P-8A Integrated Training Center. Flight crew and mission specialists are assigned to the Naval Air Station Jacksonville P-8A Integrated Training Center where they undertake classroom instruction as well as full-motion, simulated exercises that present the highest degree of realism. The Navy's replacement platform for the P-3C, the P-8A Poseidon, is designed to secure the Navy's future in long-range maritime patrol capability, while transforming how the Navy's maritime patrol and reconnaissance force will man, train, operate and deploy. The P-8A provides more combat capability from a smaller force and less infrastructure while focusing on worldwide responsiveness and interoperability with traditional manned forces and evolving unmanned sensors. (U.S. Navy photo by Mass Communication Specialist 2nd Class Salt Cebe/Released) 

"American troops of the 28th Infantry Division march down the Champs Elysees, Paris, in the `Victory' Parade." Poinsett, August 29, 1944. 

 Parachutes open overhead as waves of paratroops land in Holland during operations by the 1st Allied Airborne Army. September 1944. 111-SC-354702.

150930-N-MQ094-059 ATLANTIC OCEAN (Sept. 30, 2015) A C-2A Greyhound assigned to the Rawhides of Fleet Logistic Support Squadron (VRC) 40 lands on the flight deck of the aircraft carrier USS Harry S. Truman (CVN 75). The Harry S. Truman Carrier Strike Group is underway conducting training in preparation for a future deployment. (U.S. Navy photo by Mass Communication Specialist 3rd Class E. T. Miller/Released)