Glenn, born in 1921, grew up in Ohio. He started his flying career (生涯) as a fighter pilot for the US Marine Corps. He won medals for his brave service in World War II (1939-1945) and the Korean War (1950-1953). After that, Glenn took a dangerous job as a Marine Corps test pilot, flying new planes to see if they were safe. In 1957, he set an air-speed record by flying from Los Angeles to New York in less than three and a half hours.
In the late 1950s, a “space race” began between the US and the Soviet Union. Both countries wanted to be the first to send a human into space, including to the moon. In 1959, Glenn became one of the seven test pilots chosen to take part in the US's first space program.
In 1961, the Soviet Union became the first nation to send a person into space. Glenn's chance to go into space came on February 20, 1962. By that time, another American, Alan B. Shepard, had flown in space, but he had not circled the earth. Glenn's flight was aired live on television and radio.
Glenn's flight showed that the US space program was as good as the Soviet Union's. He became a hero. Cities across the country threw parades (游行) for him, and President John F. Kennedy invited him to the White House.
In 1974, Glenn was elected to Congress. Glenn returned to space in 1998, when he was 77. He spent nine days on the space shuttle (航天飞机) Discovery. Glenn went so that scientists could study the effects of space travel on older people. He holds the record for being the oldest person in space.
“Glenn spent his life breaking barriers (障碍),” said President Barack Obama. The president also praised Glenn for inspiring future leaders in space exploration.
