Soldiers conduct an emergency deployment readiness exercise mission at Pacific Missile Range Facility Barking Sands on the island of Kauai, Hawaii, on Dec. 10, 2020. (Staff Sgt. Alan Brutus/Army)Aviation Maintenance Administrationman Robert Murdolo signals to the pilots of an MH-60R Sea Hawk helicopter Dec. 15, 2020, during night flight operations aboard the guided-missile cruiser USS Princeton (CG 59) in the North Arabian Sea. (MC2 Logan C. Kellums/Navy)Marines fire a MK-153 shoulder-launched multipurpose assault weapon in a live-fire squad attack range during exercise Fuji Viper 21.1 at Combined Arms Training Center, Camp Fuji, Japan, on Dec. 10, 2020. (Lance Cpl. Ujian Gosun/Marine Corps)Electrician’s Mate 1st Class Amber Burns fires an M4 carbine rifle Dec. 15, 2020, during a live-fire qualification exercise as part of unit level training at Camp Pendleton, Calif. (Chief Boatswain’s Mate Nelson Doromal Jr./Navy)A Special Tactics operator guides a 27th Special Operations Wing MC-130J onto a runway during an exercise Nov. 6, 2020, at Melrose Air Force Range, N.M. (Staff Sgt. Ridge Shan/Air Force)Gunnery Sgt. Nathaniel Schoenhoefer takes aim during the 2020 Far East Intramural Matches on Camp Hansen, Okinawa, Japan, Dec. 10, 2020. (Lance Cpl. Zachary Larsen/Marine Corps)A military training instructor, center, stands in front of his flight during a basic military graduation and coining ceremony Dec. 10, 2020, at Joint Base San Antonio-Lackland, Texas. (Sgt. Jose Torres Jr./Army)Gasses ignite as an M1 Abrams tank fires its main gun during a Dec. 10, 2020, live fire as part of the Ready to Fight operations after arriving to the Pabrade Training Area, Lithuania. (Sgt. Alexandra Shea/Army)Soldiers with the 2nd Battalion, 113th Infantry Regiment, New Jersey Army National Guard, fire the 120mm mortar system on Joint Base McGuire-Dix-Lakehurst, N.J., Nov. 13, 2020. (Spc. Michael Schwenk/Army National Guard)