Air Force Staff Sgt. Clark Collins gives a thumbs up on a request for close air support during Operation Northern Strike 2014 near Grayling, Mich., Aug. 13, 2014. Collins is a joint terminal air controllers assigned to the 118th Air Support Operations Squadron. Air Force Staff Sgt. Clark Collins gives a thumbs up on a request for close air support during Operation Northern Strike 2014 near Grayling, Mich., Aug. 13, 2014. Collins is a joint terminal air controllers assigned to the 118th Air Support Operations Squadron. SHARE: Download: Full Size (1.94 MB) Tags: Photo Essays Credit: VIRIN: 224861-D-FOL43-267.jpg Photo Gallery