In the 60’s , NASA’s rows of workstations were all occupied by clean-cut white men in shirts and ties. No women and minorities were anywhere to be seen.That didn’t mean they weren’t present . A group of female African American mathematicians had been working for years in NASA’s West Area Computing Unit, checking formulae and numbers that would send American astronauts into space. They were kept separate from white women doing the same job, and from their male bosses upstairs, because segregation laws were still in force in the U.S. at the time. These women did all the math by hand before the…