Lance Cpl. Irvin Serna, an aircraft avionics technician,

Lance Cpl. Irvin Serna, an aircraft avionics technician, preforms preflight checks on an RQ-21A Blackjack unmanned aerial vehicle before a training flight during exercise Black Shadow at Fort Stewart, Georgia, January 20, 2021. Marines with Unmanned Aerial Vehicle Squadron 2 (VMU-2) trained with soldiers with the Combat Aviation Brigade, 3rd Infantry Division in an unfamiliar environment in order to increase proficiency in critical mission skills such as aerial reconnaissance, convoy escort, and support of close air support. VMU-2 is a subordinate unit of 2nd Marine Aircraft Wing, which is the air combat element of II Marine Expeditionary Force. (U.S. Marine Corps photo by Cpl. Gavin Umboh)