Final Check Air Force Col. Kristoffer Smith performs pre-flight checks during Exercise Red Flag-Nellis at Nellis Air Force Base, Nev., March 20, 2023. SHARE: Download: Full Size (3.23 MB) Tags: air force, exercise red flag-nellis Credit: Air Force Staff Sgt. Madeline Herzog VIRIN: 230320-F-ZB805-0217.JPG Photo Gallery