Gulfport Army Air Field Hangar - Credit: Wikimedia Commons
Gulfport Army Air Field Hangar, also known as FBO Hangar and Gulfport Municipal Airport Terminal, was constructed in 1944-45 for use in training combat crews to operate the B-29 Superfortress. Located in Gulfport, Mississippi, the hangar was added to the National Register of Historic Places in 2011, and was designated a Mississippi Landmark in 2012. Read more on Wikipedia
Source: en.wikipedia.org