The “Square D” emblem became the official designation of the 3rd Air Division and the subordinate 100th Bomb Group during World War, Royal Air Force Mildenhall, England, Oct. 15, 2021. Proud to continue on the legacy of the brave Airmen of the 100th Bomb Group, RAF Mildenhall Airmen currently wear this patch on their uniforms. (U.S. Air Force photo by Airman 1st Class Viviam Chiu).