PHILADELPHIA, PA.- Ten years to the day that two hijacked planes crashed into the twin towers of the World Trade Center in New York City, Penn Museum marks the solemn occasion with two special programs September 11, and one October 12–and a powerful display, Excavating Ground Zero: Fragments from 9/11, on view August 20 through November 6, 2011. The program and the display offer visitors a timely opportunity to remember–and reflect anew. In the weeks, months, and years following the events of September 11, 2001, archaeologists and physical anthropologists excavated the site of the World Trade Center in New York City. Penn Museum‘s special display features 15 poignant objects recovered at the site of Ground Zero, including eyeglasses, a computer