MCAS YUMA, Ariz. -- Aircraft with Marine Operational Test and Evaluation Squadron 1 (VMX-1) return from a training exercise in Yuma, Ariz., Dec. 20, 2019. This training exercise was conducted to give the pilots and air crew of VMX-1 experince and flight hours. (U.S. Marine Corps photo by Lance Cpl. Andres Hernandez)