Col. Thomas Falzarano, 21st Space Wing commander, pushes

Col. Thomas Falzarano, 21st Space Wing commander, pushes the button to close one of the giant blast doors made of concrete and steel in Cheyenne Mountain Air Force Station, Colorado on Aug. 16, 2019. CMAFS has a primary role of collecting information from satellites and ground-based sensors throughout the world and disseminating the data to North American Aerospace Defense Command, U.S. Northern Command and U.S. Strategic Command. (U.S. Air Force photo by Staff Sgt. Alexandra M. Longfellow)