U.S. Marine Corps Warrant Officer Randall J. Walker, an explosive ordnance disposal officer attached to Headquarters Battery, 14th Marine Regiment, 4th Marine Division, gives a class to Marines from Headquarters Battery, on general demolishes and range safety, before a demo range at Adazi Training Area, Latvia, March 8, 2019, during exercise Dynamic Front 19. Exercise Dynamic Front 19 includes approximately 3,200 service members from 27 nations who are observing or participating from Grafenwoehr Training Area, Germany; Riga, Latvia; and Torun, Poland; during March 2-9, 2019. Dynamic Front is an annual U.S. Army Europe exercise focused on the readiness and interoperability of U.S. Army, joint service, and allied and partner nations’ artillery and fire support working together in a multinational environment. (U.S. Marine Corps photo by Cpl. Niles Lee)