John Herschel Glenn Jr. was a true American icon whose extraordinary life spanned service as a military aviator, pioneering astronaut, and United States senator, leaving an indelible mark on the nation's history. Born on July 18, 1921, in Cambridge, Ohio, Glenn first distinguished himself as a decorated fighter pilot in World War II, the Chinese Civil War, and the Korean War, where he shot down three MiG-15s and earned six Distinguished Flying Crosses and eighteen Air Medals. In 1957, he made history by completing the first supersonic transcontinental flight across the United States, with his on-board camera capturing the first continuous, panoramic photograph of the country. Selected by NASA in 1959 as one of the Mercury Seven, the nation's first group of astronauts, Glenn became a household name on February 20, 1962, when he piloted the Friendship 7 mission, becoming the first American to orbit the Earth. Circling the planet three times, he solidified his place as the third American and fifth person in space, earning the NASA Distinguished Service Medal that same year and later the Congressional Space Medal of Honor in 1978.

After leaving NASA in 1964, Glenn transitioned to public service as a member of the Democratic Party, winning election to the U.S. Senate from Ohio in 1974. He served four consecutive terms until his retirement in 1999, focusing on issues such as nuclear nonproliferation and government accountability. In a remarkable coda to his space career, Glenn returned to orbit in 1998 at the age of 77 aboard Space Shuttle Discovery's STS-95 mission, making him the oldest person to enter Earth orbit. This flight also made him the only individual to fly in both the Mercury and Space Shuttle programs, and the first sitting member of Congress to visit space since Bill Nelson in 1986. Throughout his life, Glenn received numerous accolades, including induction into the U.S. Astronaut Hall of Fame in 1990 and the Presidential Medal of Freedom in 2012. As the last surviving member of the Mercury Seven, Glenn passed away on December 8, 2016, at the age of 95, but his legacy as a fearless explorer and dedicated public servant continues to inspire generations.