NORTHERN STRIKE Air Force Capt. Daniel Curtin, foreground, looks back at his team as Air Force Senior Airman Thomas Vamvakos provides security during Operation Northern Strike near Rogers City, Mich., Aug. 7, 2014. ration Northern Strike is a multinational combined arms training exercise. Curtin and Vamvakos are tactical air controllers assigned to the Illinois Air National Guard's 169th Air Support Operations Squadron. SHARE: Download: Full Size (0.08 MB) Credit: VIRIN: 626318-U-LQA96-115.jpg Photo Gallery