At Flight 93 memorial, victims' courage praised

President Barack Obama and first lady Michelle Obama lay a wreath at the Wall of Names at phase 1 of the permanent Flight 93 National Memorial near the crash site of Flight 93 in Shanksville, Pa. Sunday Sept. 11, 2011, on the 10th anniversary of the Sept. 11 attacks. ((AP Photo/Amy Sancetta))

September 11, 2011 12:01:20 PM PDT
President Barack Obama and his wife, Michelle, placed a wreath at the Flight 93 National Memorial on Sunday, arriving at the site to pay respects to the 40 passengers and crew who died a decade ago Sunday.