John Herschel Glenn Jr.

Early Life and Military Career

John Herschel Glenn Jr. was born in Cambridge, Ohio, in 1921. A decorated United States Marine Corps pilot, Glenn accumulated 149 combat missions across World War II and the Korean War, earning the Distinguished Flying Cross six times. During the Korean War, he achieved particular distinction as an exchange pilot with the U.S. Air Force, downing three MiG-15s along the Yalu River in the final nine days of combat. Beyond combat flying, Glenn trained as a test pilot at the U.S. Navy Test Pilot School at Patuxent River and set a transcontinental speed record in 1957, flying an F-8U Crusader from Los Angeles to New York in 3 hours and 23 minutes—the first supersonic flight across the continent.

The Mercury Program and the "Fireflies" Incident

On April 9, 1959, Glenn was selected as the sole Marine among the original seven U.S. astronauts. On February 20, 1962, aboard Friendship 7 during Mercury-Atlas 6, Glenn became the first American to orbit Earth, completing three orbits. During orbital sunrise, Glenn reported observing thousands of greenish-yellow, luminous particles surrounding his spacecraft, spaced roughly 6 to 10 feet apart. He famously described them to Mission Control: "I never saw anything like it. They round a little; they're coming by the capsule, and they look like little stars. A whole shower of them coming by." NASA flight controllers initially feared a catastrophic structural failure—possibly the heat shield disintegrating—but investigation later revealed the particles to be ice crystals, formed both from hydrogen peroxide decomposition in the spacecraft's attitude control thrusters and from ice fragments drifting away from the capsule's exterior. When Mercury astronaut Scott Carpenter intentionally reproduced the phenomenon during his Aurora 7 mission in May 1962 by deliberately striking his capsule, the mystery was definitively solved. Despite the scientific explanation, the incident remains part of UFO lore as an early documented observation by an American astronaut of an initially unidentified phenomenon in space.

Senate Career and UAP Investigation

Glenn returned to flight in his second orbital mission as part of the Shuttle program. After leaving NASA, he was elected to the U.S. Senate from Ohio in 1974, serving four consecutive terms until his retirement in 1999—a record for a popularly elected Ohio senator. He chaired the Senate Governmental Affairs Committee from 1987 to 1995 and served as ranking member of the Armed Services Committee Subcommittee on Air and Land Forces. Unlike many of his contemporaries in leadership, Glenn took a serious, measured approach to the question of unidentified aerial phenomena and government transparency.

In 2007, Glenn worked closely with Senate Majority Leader Harry Reid and Senators Ted Stevens and Daniel Inouye to establish the Advanced Aerospace Weapon System Application Program (AAWSAP) under the Defense Intelligence Agency—a pioneering, classified initiative to investigate advanced aerospace threats, including unexplained UAP sightings. Glenn expressed concern about "thousands" of unidentified object reports from military personnel and advocated for rigorous congressional oversight and scientific investigation into whether UAPs posed a national security threat. Unlike some fellow astronauts who dismissed or minimized UFO reports, Glenn maintained that credible military and pilot observations deserved serious, formal investigation rather than dismissal.

Legacy

John Glenn died in 2016 at age 95, having lived through most of the modern UFO era and witnessed the transition from government secrecy to tentative disclosure. His support for UAP investigation was notably consistent: a test pilot and military officer trained to observe and report accurately, he neither endorsed fringe explanations nor dismissed eyewitness accounts. In both his astronautic and political careers, Glenn exemplified a pragmatic, evidence-based approach to the question of unexplained phenomena in Earth's skies and near-space environment.