U.S. Air Force Reserve Col. Bruce Cox, Commander of the 307th Bomb Wing, addresses graduates of the 900th STARBASE Class at W.T. Lewis Elementary School in Bossier City, La. on May 19, 2015. The STARBASE program provides a 25-hour hands-on minds-on STEM (science, technology, engineering, and mathematics) curriculum to area 5th grade students and their teachers. (U.S. Air Force photo by Master Sgt. Laura Siebert/Released)