Photographer, Leah Schwartz from Sioux City, Iowa television station KTIV, photographs a mid-air refueling from the boom operator’s window alongside Chief Master Sgt. Al Mast in the back of an Air Force KC-135. Mast is the “Chief Boom” with the 185th Air Refueling Wing, Iowa Air National Guard based in Sioux City, Iowa. (U.S. Air National Guard photo by Master Sgt. Vincent De Groot/Released)