U.S. Air Force Chief Master Sgt. Terrence Greene, right, Air Mobility Command command chief, recognizes Airman 1st Class Christian Garcia, left, 60th Diagnostics and Therapeutics Squadron lab technician, as a star performer Jan. 11, 2020, at Travis Air Force Base, California. Greene visited Travis to gain a better understanding of how the base enhances the rapid global mobility mission. (U.S. Air Force Airman 1st Class Cameron Otte)