Kathryn Sullivan, the first U.S. woman to perform a spacewalk, took this pennant on the STS 41-G mission aboard Space Shuttle Challenger in 1984. It bears the insignia of the Society of Woman Geographers, to which she had been elected as a professional geologist and explorer. Astronauts are permitted to bring a few small personal or commemorative items like this on their missions in space. Sullivan returned the flag to the Society, which then gave it to the Museum. The Society later honored her with its Gold Medal.