Chancellor Mark S. Wrighton and Joe Daniels, a 1994 graduate in Arts & Sciences and president of the National September 11 Memorial and Museum, look at signatures on a beam that will become part of the National September 11 Memorial & Museum in New York City when it is completed around 2009. Visitors were able to sign the beam as part of the traveling National September 11 Memorial & Museum Tribute Exhibition, which stopped at the Danforth Campus Nov. 3-4. The exhibit featured photos, a film and artifacts from Sept. 11.