“Liftoff, the clock is operating. We’re underway,” NASA astronaut John Glenn announced as he launched to as the first American to orbit the Earth. His spacecraft’s onboard mission elapsed time clock began counting his minutes in flight as he was boosted from Florida’s East Coast on Feb. 20, 1962 – 60 years ago. After his three-orbit mission, the U.S. Marine Corps colonel returned to Earth as the quintessential American hero.