Air Force Staff Sgt. Andrew Molina prepares his jet before the Thunderbirds pilots perform their first delta formation on Nellis Air Force Base, Nev., Jan. 13, 2015. Molina is an assistant crew chief assigned to the Air Force Thunderbirds air demonstration team. Air Force Staff Sgt. Andrew Molina prepares his jet before the Thunderbirds pilots perform their first delta formation on Nellis Air Force Base, Nev., Jan. 13, 2015. Molina is an assistant crew chief assigned to the Air Force Thunderbirds air demonstration team. SHARE: Download: Full Size (1.86 MB) Tags: Photo Essays Credit: VIRIN: 349928-B-QPS71-870.jpg Photo Gallery