By the 1930s, NACA needed even more computers. They turned to a new population: women. NACA hired its first five female computers—all white—in 1935. By 1946, the number of female, NACA-trained computers had passed 400. In that interval, two important events occurred. First, President Roosevelt was faced with protests over racial segregation and signed Executive Order 8802. It prohibited racial discrimination in hiring practices in the national defense industry. Second, the attack on Pearl Harbor in 1941 brought the US into World War II. The federal defense industry quickly became one of the best options for African Americans with college degrees. NACA faced a problem by the 1930s. They needed more human computers. What was the solution?