Victoria St. Martin, The Washington Post Fame has finally found Katherine Johnson – and it only took 98 years, six manned moon landings, a best-selling book and an Oscar-nominated movie. For more than 30 years, Johnson worked as a NASA mathematician at Langley Research Center in Hampton, Virginia, where she played an unseen but pivotal role in the country’s space missions. That she was an African-American woman in an almost all-male and white workforce made her career even more remarkable. Now, three decades after retiring from the agency, Johnson is portrayed by actress Taraji Henson in “Hidden Figures,” a film based on a book of the same name. The movie tells how a...