U.S. Air Force Gen. Maryanne Miller, center, Air Mobility Command commander, and Chief Master Sgt. Terrence Greene, right, AMC command chief, listen to a presentation given by Col. Kristen Beals, left, 60th Medical Group commander, during a visit to David Grant USAF Medical Center, Travis Air Force Base, California, April 16, 2019. During the four-day base tour Miller and Greene met with Airmen across Travis to see firsthand how the base enhances AMC’s global mobility capabilities. (U.S. Air Force photo by Heide Couch)