Pima Air & Space Museum is one of the largest air and space museums in the world. Located in Tucson, Ariz., it is also one of the largest nongovernment funded aviation museum. The museum features more than 200 aircrafts and spacecrafts. Pima Air & Space Museum s collection includes President John F. Kennedys Air Force One, B-29 Superfortress and SR-71 Blackbird. It has various hangars totaling over 177,000 feet of exhibit space. The museum maintains an aircraft restoration center and specialized aircraft restoration shop. Pima Air & Space Museum organizes tours of Aerospace Maintenance and Regeneration Group (AMARG). Founded in 1976, it serves approximately 150,000 local and international visitors annually.