U.S. Air Force Staff Sgt. Joshua Tanner, 51st Combat Communications Squadron radio frequency transmission system technician, inspects an L3 Satellite System during Staff Exercise 20-2 at Naval Air Station Keflavik, Iceland, Feb. 10, 2020. The squadron trains, deploys and delivers communications, air traffic control and landing systems for dominant combat operations. (U.S. Air Force photo by Staff Sgt. Christopher Maldonado)