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https://www.history.com/this-day-in-history/an-american-orbits-earth?cmpid=email-hist-tdih-2023-0 [login to see] 3&om_rid=
From Cape Canaveral, Florida, John Herschel Glenn Jr. is successfully launched into space aboard the Friendship 7 spacecraft on the first orbital flight by an American astronaut.
It was with this responsibility in mind that John Glenn lifted off from the launch pad at Cape Canaveral at 9:47 a.m. on February 20, 1962. Some 100,000 spectators watched on the ground nearby and millions more saw it on television. After separating from its launching rocket, the bell-shaped Friendship 7 capsule entered into an orbit around Earth at a speed of about 17,500 miles per hour. Smoothing into orbit, Glenn radioed back, “Capsule is turning around. Oh, that view is tremendous.”

During Friendship 7‘s first orbit, Glenn noticed what he described as small, glowing fireflies drifting by the capsule’s tiny window. It was some time later that NASA mission control determined that the sparks were crystallized water vapor released by the capsule’s air-conditioning system. Before the end of the first orbit, a more serious problem occurred when Friendship 7‘s automatic control system began to malfunction, sending the capsule into erratic movements. At the end of the orbit, Glenn switched to manual control and regained command of the craft.