John Glenn, born: July 1921 in Cambridge, OH is a former United States Marine Corps pilot, astronaut, and United States senator who was the first American to orbit the Earth and the third American in space.
Katherine Johnson(born Mathematician Katherine Coleman Goble Johnson was a NASA mathematician for the Mercury program, the Apollo 11 mission, up through the Space Shuttle program. She famously was asked by astronaut John Glenn to double-check.
February John Glenn became the first American to orbit the Earth, aboard Friendship on the Mercury-Atlas 6 mission, circling the globe three times during a flight lasting 4 hours, 55 minutes, and 23 seconds.
John Glenn, former Marine Corps pilot, astronaut and U.S. Senator, left, receives the Presidential Medal of Freedom from U.S. President Barack Obama at the White House in Washington, D.C., U.S., on Tuesday, May 29, 2012. The Medal of Freedom is the nation's highest civilian honor. Photographer: Andrew Harrer/Bloomberg via Getty Images "R.I.P. 12/8/16"