185th Air Refueling Wing Commander Col. Larry Christensen presents Chief Master Sgt. James M. Carlson with a U.S. flag on the occasion of his retirement on February 6, 2015 in Sioux City Iowa. Carlson retired from the Air National Guard Security Forces Squadron after 35 years of service. (U.S. Air National Guard photo by Staff Sgt. Daniel S. Ter Haar/Released)