Newspaper front pages left by visitors at a temporary memorial on a hillside above the United Airlines Flight 93 crash site in Shanksville, Pennsylvania, May 2, 2011.
REUTERS/Daniel Lovering
Newspaper front pages left by visitors at a temporary memorial on a hillside above the United Airlines Flight 93 crash site in Shanksville, Pennsylvania, May 2, 2011.
REUTERS/Daniel Lovering