Man’s exploration of outer space is one of the greatest achievements of the 20thcentury. But “one small step for man, one giant leap for mankind” could never have happened if it weren’t for the women on the ground at the National Aeronautics and Space Administration (NASA). The new film “Hidden Figures” tells the stories of Katherine Johnson, Dorothy Vaughan and Mary Jackson, who worked as “human computers” for NASA, and helped put John Glenn into orbit and Neil Armstrong on the moon. Taraji P. Henson, Octavia Spencer and Janelle Monáe, the stars of “Hidden Figures,” stopped by Yahoo News to discuss the film and true story behind it.