Viper Check Air Force Tech. Sgts. Steven Smart and Stephanie Lunstrom conduct a pre-inspection on an F-16 Viper engine at Holloman Air Force Base, N.M., Oct. 17, 2019. SHARE: Download: Full Size (1.93 MB) Tags: Air Force Credit: Air Force Staff Sgt. Christine Groening VIRIN: 191017-F-WZ808-1008C.JPG Photo Gallery