This is Ruth Jackson-Levy. During the Korean War, the US Air Force was studying where to reinforce the armor on its bombers. By examining the aircraft that had returned from their missions, they found that most bullet holes were in the fuselage and wingtips. Therefore, they concluded, these were the parts of the plane that needed reinforcement.

However, during the night, Dr. Jackson-Levy (who was working as a janitor at the time) came across the problem and reached the correct conclusion. She realized that the reason the planes had fewer bullet holes in the other areas was that damage to these areas would cause the plane to crash and never return to base. Therefore the exact opposite areas needed to be reinforced.

The Air Force and later NASA tried to hire Dr Jackson-Levy but she refused because of how they had earlier treated her. They even tried to pay her a lot but she refused. MIC DROP.