A coin and patch from the U.S. Air Force Test Pilot School's Space Test Fundamentals Course Class 21-1 rest on a table at Edwards Air Force Base, California, April 6, 2021. The first course of its kind, STF enables the USSF to enhance its test and evaluation mission and multiply its ability to deliver combat-ready space forces. (U.S. Air Force Photo/Tech. Sgt. Robert Cloys)