March 8 is International Women’s Day, and InsideEdition.com is celebrating pioneering American women. Cathay Williams was the first African-American woman to enlist in the United States Army. Sally Ride was the first female astronaut. Brenda Berkman was a female firefighter who became the first woman to be hired by the FDNY. And Margaret Heafield Hamilton and Katherine Johnson were NASA scientists who helped put a man on the moon.