The amazing thing about Katherine was that with only a pencil and a slide rule she could calculate the precise trajectories for Apollo 11 to land on the moon in 1969. She could do so much of the math in her head that determined the success of missions to the moon and other planets. Another amazing thing is that even though the white women worked separate from the white men and the black women worked separately, there was mutual respect. As Katherine puts it NASA was a very professional organization and there was not the time to think what color I was. She said she never had a feeling of inferiority, never, she thought of herself as good as anybody else, and not any better. NASA has its computational facility named after her. She also had a famous line- calling her group of women mathematicians at NASA "computers in skirts." A movie "Hidden Figures" recalls this time and the women at NASA, America's space program agency. ...