Lieutenant General John T. "Tom" Sheridan is Commander, Space and Missile Systems Center, Los Angeles AFB, California. His previous duties include being Deputy Director, National Reconnaissance Office, and Program Executive Officer and System Program Director for Space Radar, Chantilly, Virginia. As Deputy Director, he assists the Director and Principal Deputy Director in the day-to-day direction of the NRO, and also serves as the senior Air Force officer for Air Force civilian and uniformed personnel assigned to the organization. For Space Radar, he directs a program designed to satisfy both Department of Defense and Intelligence Community needs as part of a system of systems integrated approach toward persistent surveillance and reconnaissance capability for the nation.