Learjet C-21A
DAYTON, Ohio -- One of the U.S. Air Force’s first Learjet C-21A aircraft landed at the National Museum of the U.S. Air Force on Aug. 28, 2013. Pictured here are pilot Col. Kent Olson (left), commander of the 119th Wing of the North Dakota Air National Guard, and co-pilot Col. Brad Derrig, vice commander of the 119th Wing. (U.S. Air Force photo by Don Popp)