Harry S. Truman

Harry S. Truman, U.S. President from 1945 to 1953, encountered the UFO phenomenon amid post-World War II sightings that ignited national intrigue. In 1947, after Kenneth Arnold's "flying saucer" report, Truman quipped during a press conference that he'd seen them "only in the newspapers," dismissing rumors while the Air Force launched investigations. Alarmed by escalating reports, he directed military aide Col. Robert Landry in 1948 to assess UFOs as potential national security threats, requesting quarterly briefings; none revealed credible dangers, though sightings persisted.

The 1952 Washington, D.C. flap—radar blips at National Airport and Andrews Air Force Base, confirmed by pilots—prompted Truman to demand explanations from Project Blue Book's head, leading to a massive Pentagon press conference attributing them to temperature inversions. Discredited Majestic-12 memos allegedly link him to Roswell crash probes, but Truman Library archives debunk their authenticity, confirming his 1947 whereabouts elsewhere. Truman's pragmatic oversight shaped early government UFO scrutiny without endorsing extraterrestrial claims.