This 4 by 6 inch flag was one of nearly 6,000 that were flown on Endeavour as part of the Flags for Heroes and Families campaign to honor the victims of the September 11, 2001 terrorist attacks in New York, Washington, D.C. and Pennsylvania. Students working at Johnson Space Center in Houston, Texas assembled the commemorative packages, including the U.S. flags flown in space, to be presented to relatives of the victims. Distribution began on June 14, 2002, National Flag Day, at a ceremony held at the American Museum of Natural History's Rose Center for Earth and Space in New York.