Kfir aircrafts of the Colombian Air Force overfly the Marco Fidel Suarez military aviation school during a graduation ceremony in Cali, Colombia, on December 6, 2019. (Photo by LUIS ROBAYO/AFP via Getty Images)
A visitor checks a rifle displayed at the Fifth Gulf Defence and Aerospace exhibition (GDA) in Kuwait City on December 10, 2019. - Exhibitors meet professionals from the industry at the international defence, aerospace and internal security event which mainly targets member states of the Gulf Cooperation Council (GCC). (YASSER AL-ZAYYAT/AFP via Getty Images)
Paratroopers assigned to the 4th Infantry Brigade Combat Team (Airborne), 25th Infantry Division, U.S. Army Alaska, conduct a parachute jump on Malemute drop zone at Joint Base Elmendorf-Richardson, Alaska, Dec. 11, 2019. (U.S. Air Force/Justin Connaher).
In this photograph taken on December 4, 2019, French Marine Nationale anti-aircraft frigate, retired from active service in the French Navy, stands in a dry dock for dismantling at Toulon Naval Base, southern France. (GERARD JULIEN/AFP via Getty Images)
Bolivia's army members take part in the closing of the Satinadores XXXVIII training course, at the Bolivian Army's School of Condors, in Yacuiba, Tarija, Bolivia, on December 14, 2019. (JORGE BERNAL/AFP via Getty Images)
Indian Navy sailors take part in a simulated rescue operation during the Navy Day celebrations at the Gateway of India in Mumbai on December 4, 2019. (PUNIT PARANJPE/AFP via Getty Images)
U.S. Marine Lance Cpl. Matthew Stearns with 1st Battalion, 25th Marine Regiment, currently assigned to 4th Marine Regiment, 3rd Marine Division, under the Unit Deployment Program, holds security during an insert via MV-22B Osprey with Marine Medium Tiltrotor Squadron 262 and Japanese UH-1J Hueys, as part of a comprehensive force on force event at Forest Light Middle Army in Aibano Training Area, Shiga, Japan, Dec. 11, 2019. Forest Light Middle Army is an annual training exercise that is designed to enhance the collective defense capabilities of the United States and Japan Alliance. (U.S. Marine Corps/Lance Cpl. D’Angelo Yanez)
The Bayraktar TB2 drone is pictured on December 16, 2019 at Gecitkale Airport in Famagusta in the self-proclaimed Turkish Republic of Northern Cyprus (TRNC). - The Turkish military drone was delivered to northern Cyprus amid growing tensions over Turkey's deal with Libya that extended its claims to the gas-rich eastern Mediterranean. (BIROL BEBEK/AFP via Getty Images)
Marines prepare and execute training during Steel Knight 20 (SK20) at Marine Corps Air Ground Combat Center, Twentynine Palms, Calif., on Dec. 2, 2019. (Lance Cpl. Benjamin Aulick/Marine Corps)
Two F-22 Raptors fly over Joint Base Pearl Harbor-Hickam, Hawaii, Dec. 5, 2019. (Airman 1st Class Erin Baxter/Air Force)