Staff Sgt. Michael Alger and Airman 1st Class John Nipp, explosive ordnance disposal Airmen with the 1st Special Operations Civil Engineer Squadron, measure a blast hole during post-blast analysis training at Hurlburt Field, Fla., Nov. 19, 2015. A Post-blast analysis takes place when an improvised explosive device detonates and EOD Airmen arrive on scene to determine what happened. (U.S. Air Force photo by Senior Airman Meagan Schutter)