William Walter, program analyst with Air Force Special Operations Command, AC-130 Requirements, and former AC-130 gunship crew member, poses for a photo Nov. 3, 2020 at Hurlburt Field, Florida. Walter was selected by AFSOC leadership to compete at the Spark Tank Finals in Feb. 2021 for his design of a low-cost alternative training round for AC-130 gunships. (U.S. Air Force photo by Senior Airman Brandon Esau)