A set of insignia from the 353rd Combat Training Squadron, Detachment 1 of Alaska, and the Cope Thunder exercise at Elmendorf Air Force Base. These were received from someone involved with Cope Thunder. - Unit Name: 353rd Combat Training Squadron - Unit Details: Detachment 1 - Base Name: Elmendorf Air Force Base - Exercise Name: Cope Thunder - Location: Alaska Approximately 4cm in diameter and 5mm thick. They have been stored in a soft case. If you are interested, please consider purchasing them.