U S AIR FORCE AIR COMBAT COMMAND Challenge Coin. This is a US AIR FORCE Air Combat Command Commemorative Challenge Coin. Insignia on front side and rear side displays a gold plated U S Air Force logo. Coin is about 1 9/16" in diameter. All details are raised lettering. Coin is contained in an acrylic air tight holder. Air Combat Command (ACC) is one of ten major Major Commands (MAJCOMs) in the United States Air Force, reporting to Headquarters, United States Air Force (HAF) at the Pentagon. ACC is headquartered at Langley Field, Joint Base Langley-Eustis (formerly Langley AFB), Virginia. The mission of Air Combat Command is to be the primary force provider of non-nuclear combat airpower to America's warfighting commands. To support global implementation of national security strategy, ACC operates fighter, bomber, reconnaissance, battle-management and electronic-combat aircraft. Air Combat Command also provides command, control, computing, communications and intelligence (C4I) systems, and conducts global information operations.