KIRKUK REGIONAL AIR BASE, Iraq – Col. Chris Pehrson, 321st Air Expeditionary Advisory Group commander, left, and Lt. Col. Christopher Spigelmire, 521st Air Expeditionary Advisory Squadron commander, decommission the 521 AEAS guideon Jan. 11. Their mission was to train the Iraqi air force’s Squadron 3 to fly intelligence, surveillance and reconnaissance missions. (U.S. Air Force photo/Staff Sgt. Tabitha Kuykendall)