Air Force Senior Airman Mark Brinkman, Airman 1st Class Justin Frawley and Staff Sgt. Scott Shirley advance through an opening in a fence while participating in a launch facility re-capture exercise on F.E. Warren Air Force Base, Wyo., Feb. 18, 2014. Brinkman, Frawley and Shirley are assigned to the 90th Security Forces Group Tactical Response Force. Air Force Senior Airman Mark Brinkman, Airman 1st Class Justin Frawley and Staff Sgt. Scott Shirley advance through an opening in a fence while participating in a launch facility re-capture exercise on F.E. Warren Air Force Base, Wyo., Feb. 18, 2014. Brinkman, Frawley and Shirley are assigned to the 90th Security Forces Group Tactical Response Force. SHARE: Download: Full Size (2.14 MB) Tags: Photo Essays Credit: VIRIN: 537180-P-CXF66-501.jpg Photo Gallery