A U.S. Army Soldier assigned to 1st Brigade Combat Team, 4th Infantry Division, performs a dismounted patrol at the National Training Center in Fort Irwin, Calif., Jan. 13, 2018.
U.S. Marines assigned to Bravo Battery, 2nd Low Altitude Air Defense (LAAD) Battalion sight in on an aircraft and launch a green star cluster during a field training exercise at the National Training Center (NTC) in Fort Irwin, Calif., Jan. 16, 2018. NTC 18-03 is a simulated combat training exercise in which Marines with 2nd LAAD conducted Ground Based Air Defense in defense of Soldiers with 1st Squadron, 11th Armored Cavalry Regiment.