Varsity Blues Air Force Staff Sgt. Deylin Cortellini signals during a simulated ground attack at Kapaun Air Station, Germany, Dec. 11, 2019, during Operation Varsity, a weeklong training exercise. SHARE: Download: Full Size (1.06 MB) Tags: Air Force Credit: Air Force Staff Sgt. Devin Boyer VIRIN: 191211-F-EQ901-1380C.JPG Photo Gallery