Sally Ride

Dr. Sally Ride uses a screwdriver to clean out an air filtering system aboard the space shuttle Challenger in June of 1983. That was the flight on which she became the first American woman in space.

According to NASA, "Her shirt features a cartoon of 35 busy astronauts around a shuttle with the acronym TFNG, which stands for 'thirty five new guys,' a nickname for the 1978 astronaut class." Photo: NASA