U.S. Air Force Chief Master Sgt. Terrence Greene, right, AMC command chief, tries out a pair of augmented reality glasses as Capt. Kristofer Fernandez, deputy director, Phoenix Spark hub, explains their use during a visit to the Phoenix Spark innovation facility atTravis Air Force Base, California, April 16, 2019. During the four-day base tour Greene and Gen. Maryanne Miller, AMC commander, met with Airmen across Travis to see how the base enhances AMC’s global mobility capabilities. (U.S. Air Force photo by Heide Couch)