U.S. Air Force Gen. Mark Kelly, commander of Air Combat Command, speaks virtually to the winners of this year's Spark Tank from Joint Base Langley-Eustis, Va., Nov. 1, 2021. The goal of Spark Tank is to encourage Airmen to think of innovative approaches to everyday tasks in their work centers. (U.S. Air Force photo by Airman 1st Class Chloe Shanes)