RIP Katherine Johnson (1918-2020). What a life:

🙏 One of the first African-American women to work at NASA.
🙏 Worked as a “human computer" for Mercury, Apollo, Shuttle programs
🙏 John Glenn requested she personally re-check computer calculations before his Friendship 7 mission pic.twitter.com/qxhdZ4edeJ

— Popular Science (@PopSci) February 24, 2020