A U.S. Air Force Office of Special Investigations Special Agent from Detachment 303, left, gives a counterintelligence briefing to Airmen from the 22nd Airlift Squadron at Travis Air Force Base, California, Feb. 10, 2023. To commemorate 75 years, OSI is celebrating its founding by telling their stories, hailing Airmen past, present and future, and advancing national security priorities. (U.S. Air Force photo by Nicholas Pilch)