Glenn resigned from NASA in January 1964. A member of the Democratic Party, Glenn was first elected to the Senate in 1974 and served for 24 years, until January 1999. In 1998, while still a sitting Senator, Glenn flew on the Discovery space shuttle's STS-95 mission, making him the oldest person to fly in space and the only person to fly in both the Mercury and Space Shuttle programs. Glenn, the last surviving member of the Mercury Seven, died at the age of 95 in 2016. He is survived by his wife Annie Glenn, an advocate for people with disabilities and communication disorders.
John Herschel Glenn Jr. was born on July 18, 1921, in Cambridge, Ohio, the son of John Herschel Glenn Sr., who worked for a plumbing firm, and Clara Teresa née Sproat, a teacher. His parents had married shortly before his father, a member of the American Expeditionary Force, left for the Western Front during World War I. The family moved to New Concord, Ohio, soon after his birth, and his father started his own business, the Glenn Plumbing Company. Glenn Jr. was only a toddler when he met Anna Margaret (Annie) Castor, who would later become his wife. The two would not be able to recall a time when they did not know each other. He first flew in an airplane with his father when he was eight years old. He became fascinated by flight, and built model airplanes from balsa wood kits. Along with his adopted sister Jean, he attended New Concord Elementary School. He washed cars and sold rhubarb to earn money to buy a bicycle, after which he took a job delivering The Columbus Dispatch newspaper. He was a member of the Ohio Rangers, an organization similar to the Cub Scouts. His boyhood home in New Concord has been restored as a historic house museum and education center.