President Barack Obama Visits Ground Zero in New York

United States President Barack Obama signs the guest book standing near members of the NYPD at the First Precinct before visiting Ground Zero, the site of the former Twin Towers, days after Osama Bin Laden was killed by U.S. Navy Seals almost 10 years after the terrorist attacks on the World Trade Center in New York on May 5, 2011. UPI/John Angelillo