John Glenn was born in 1921 in Ohio. He studied engineering in college and became an astronaut for NASA's Project Mercury. On February 20, 1962, Glenn became the first American to orbit Earth aboard Friendship 7. He inspired the nation and was hailed as a national hero. Glenn had a long career as a pilot, flying over 100 missions for the Marines in World War II and Korea. He later served as a US Senator from Ohio. Glenn continued to advocate for science and space exploration throughout his life.