Lt. Gen. Terrence O'Shaughnessy, 7th Air Force commander, pins on the Legion of Merit onto Col. Brook Leonard, 51st Fighter Wing commander, during the 51st FW Change of Command Ceremony, June 16, 2015, at Osan Air Base, Republic of Korea. During a Change of Command ceremony, the passing of colors, standards, or ensigns from an outgoing commander to an incoming one ensures that the unit and its soldiers is never without official leadership, a continuation of trust, and also signifies an allegiance of soldiers to their unit's commander. (U.S. Air Force photo by Senior Airman Matthew Lancaster)