Marine Corps Air Station Yuma, Ariz. -- U.S. Marines with Marine Test and Evaluation Squadron (VMX) 1 conduct aerial training in a UH-1Y over the Sonoran Desert, Az., on Nov. 15, 2019. VMX-1 is an operational test squadron that tests multiple aircraft, allowing the continuation of improving the safety, reliability, and lethality of Marine Corps aircraft. (U.S. Marine Corps photo by Lance Cpl John Hall)