Photo Information The last seven T-37B Tweets in the Air Force inventory, including the two pictured, took off for one final time July 31 as part of the aircraft's retirement ceremony. The four of the aircraft will make the journey to the Aerospace Maintenance and Regeneration Group at Davis-Monthan Air Force Base, Ariz., while the final three will go to the Utah Test and Training Range in Utah. (U.S. Air Force photo/Harry Tonemah)