Visitors pay respects at 9/11 memorial at Pentagon in Virginia

Michael Henry II, aged 6, holds American Flags as he visits the Pentagon's 9/11 memorial in Arlington, Virginia on May 2, 2011. Late last night President Obama announced al-Qaida leader Osama bin Laden, who was largely responsible for the terrorist attacks on the Pentagon and World Trade Center in New York, was killed by US Special Forces. His father was a Capitol Hill staffer and biked to the Pentagon on the night of September 11, 2001. UPI/Roger L. Wollenberg