- 7/18/1921 - 12/8/2016
- American - Deceased
- National Aeronautics and Space Administration
Colonel John Herschel Glenn Jr. was a United States Marine Corps aviator, engineer, astronaut, businessman, and politician. He was the first American to orbit the Earth, circling it three times in 1962. Following his retirement from NASA, he served from 1974 to 1999 as a Democratic United States Senator from Ohio.