Col. Bill Knight, left, 374th Airlift Wing commander, and Col. Edward Brown, 374th Mission Support Group commander, hold the 374 MSG guidon during the 374th MSG change of command ceremony at Yokota Air Base, Japan, on June 27, 2012. The guidon is a tradition dating back to Roman times, where military units would carry a banner with their emblem into battle. The passing of the guidon to the new commander signifies the start of that responsibility. (U.S. Air Force photo/Tech. Sgt. Samuel Morse)