US Air Force Presented by Colonel Gerald J. Frisbee Challenge CoinMeasures Approximately: 1.75 InchesNo Special EdgingFront: Presented by Colonel Gerald J. Frisbee, United States Air ForceBack: We The People...Provide...defence...and secure the Blessings of Liberty...Challenge Coins are generally created for the Military and are prized by the service members that receive them. Perfect for Collectors of Militaria.