Martin MB-2 (NBS-1) reproduction in the Early Years Gallery at the National Museum of the United States Air Force in Dayton, Ohio. (The MB-2's left wing has been folded back, showing how the wings folded for more compact storage.)
USAF
U.S. Air Force photo <a rel="nofollow" class="external autonumber" href="https://media.defense.gov/2007/Oct/30/2000435618/-1/-1/0/071030-F-1234P-005.JPG">[1]</a> from the <a rel="nofollow" class="external text" href="http://www.nationalmuseum.af.mil/Upcoming/Photos/igphoto/2000435618/">image gallery</a> on the museum website.