U.S. Air Force Airman 1st Class Logan Gutierrez, 509th Maintenance Squadron low observable trainee, performs a flush repair on an aircraft part at Whiteman Air Force Base, Mo., Sept. 15, 2015. Flush repairs are done to restore punctures on aircraft parts, preventing the metal from loosening or corroding. (U.S. Air Force photo by Senior Airman Keenan Berry/Released)