Leader Briefing Defense Secretary Dr. Mark T. Esper and Senior Enlisted Advisor to the Chairman Ramón "CZ" Colón-López receive a briefing from Air Force Maj. Gen. Andrea Tullos, the 2nd Air Force commander, at Joint Base San Antonio-Lackland, Texas, June 16, 2020. Esper met with Air Education and Training Command leaders to see firsthand how basic military training is addressing COVID-19. SHARE: Download: Full Size (3.84 MB) Tags: defense secretary, esper, seac, coronavirus, Colón-López Credit: Sarayuth Pinthong, Air Force VIRIN: 200616-F-GY993-010Y.JPG Photo Gallery