(From left) U.S. Marine Corps Lance Cpl. Dallin Butterfield,

(From left) U.S. Marine Corps Lance Cpl. Dallin Butterfield, a Joint Fires Observer with 1st Battalion, 2d Marines, currently attached to 4th Marine Regiment, 3rd Marine Division, and 1st Lt. Jay Sanley, a fire support officer, acquire visual knowledge before close air support (CAS) training on Combined Arms Training Center (CATC) Camp Fuji, Japan, Dec. 3, 2020. The CAS training provided an opportunity for Marines to increase their proficiency and lethality with close air support coordination while operating in a field environment. (U.S. Marine Corps photo by Lance Cpl. Alex Fairchild)