John Glenn

From Small-Town Ohio to the Cockpit

Before John Glenn rode a rocket, he learned to handle airplanes in demanding situations. John Herschel Glenn Jr. was born in Cambridge, Ohio, on July 18, 1921, and grew up in nearby New Concord. He studied engineering at Muskingum College and began learning to fly while still a student. After the United States entered World War II, he joined the Naval Reserve in 1942, completed flight training, and became a U.S. Marine Corps aviator.

Glenn flew 59 combat missions in the Pacific during World War II. He later served as a flight instructor and returned to combat during the Korean War, flying 90 more missions. These flights were dangerous parts of two wars, not adventures. They also gave him deep experience with aircraft, instruments, and quick decisions.

Testing Jets at Record Speed

After Korea, Glenn trained at the U.S. Naval Test Pilot School. Test pilots flew new or modified aircraft and carefully reported how each machine behaved. On July 16, 1957, Glenn flew an F8U Crusader from Los Angeles to New York in 3 hours and 23 minutes. It was the first transcontinental flight to average faster than the speed of sound.

NASA selected Glenn in April 1959 as one of the seven original Project Mercury astronauts. The group trained for the United States' first human spaceflights. Glenn also worked on cockpit layouts and controls, helping engineers shape equipment that astronauts would need to understand and operate under pressure.

Three Orbits in Friendship 7

On February 20, 1962, an Atlas rocket lifted Glenn and the Mercury capsule Friendship 7 from Cape Canaveral. Soviet cosmonaut Yuri Gagarin had become the first human to orbit Earth in 1961; Glenn's mission made him the first American to do so. He circled Earth three times in 4 hours, 55 minutes, and 23 seconds.

The flight demanded more than simply riding along. When the automatic control system had trouble keeping the capsule pointed correctly, Glenn steered manually. Controllers also saw a signal suggesting that the heat shield might be loose, so the retrorocket pack was left attached during reentry as a precaution. The warning turned out to be false, and Friendship 7 splashed down safely near Grand Turk Island.

Public Service and a Return to Space

Glenn left NASA in 1964 and later won election to the U.S. Senate. Beginning in 1975, he represented Ohio for 25 years and supported science and health research while serving on major committees. His public career showed that his work did not end with one famous flight.

In 1998, while still a senator, Glenn returned to space aboard the shuttle Discovery. At age 77, he was then the oldest person to travel in space. The nine-day STS-95 mission completed 134 Earth orbits and included studies of spaceflight and aging. Glenn died on December 8, 2016. His wider contribution joined skilled flying, careful engineering, scientific research, and public service—and showed how exploration depends on both individual preparation and large teams working together.