The Northrop/McDonnell Douglas YF-23 was a prototype fighter aircraft designed for the United States Air Force. The YF-23 was a finalist in the U.S. Air Force's Advanced Tactical Fighter competition. Two YF-23s were built and were nicknamed "Black Widow I
National Air and Space Museum, Steven F. Udvar-Hazy Center. The X-35B prototype which was used to evaluate the STOVL abilities of the future F-35. Canon EOS 40D, EF 24-105mm f/4.0 L IS USM lens.