A U.S. Air Force F-15 Eagle takes off into the cloudy Tucson, Ariz. sky during dissimilar air combat training operations with the 162nd Fighter Wing, Jan. 21, 2020. For two weeks the 173rd Fighter Wing flew the adversary air portions of sorties for the F-16 pilot training operations freeing up cockpit space for more student training. (U.S. Air National Guard photo by Master Sgt. Jefferson Thompson)