U.S. Air Force Master Sgt. Renier Herrera, Air National Guard member and student at the Inter-American Air Forces Academy, listens to a classmate during a small group discussion as part of the International Senior Non-Commissioned Officer Course Oct. 20, 2021. Herrera was one of 189 students who graduated during a ceremony Dec. 8, 2021 at Joint Base San Antonio-Lackland, Texas. (U.S. Air Force photo by Vanessa R. Adame)