IED Detonation Air Force Senior Airman Kyle Koski detonates improvised explosive devices during Northern Challenge 16 at Icelandic Coast Guard Keflavik Facility, Iceland, Sept. 19, 2016. Koski is an explosive ordnance disposal craftsman assigned to the 52nd Civil Engineer Squadron. Air Force photo by Staff Sgt. Jonathan Snyder SHARE: Download: Full Size (1.83 MB) Tags: air force, training, airmen Credit: Staff Sgt. Jonathan Snyder VIRIN: 160919-F-RH756-372A.JPG Photo Gallery