Photos: 9/11 remembrances
151845635AW008_PRESIDENT_OB
Credit: Getty Images
WASHINGTON, DC - SEPTEMBER 11: U.S. President Barack Obama (L) and first lady Michelle Obama (R) walk out from the residence to observe a moment of silence with White House staff to mark the 11th anniversary of the 9/11 attacks September 11, 2012 at the South Lawn of the White House in Washington, DC. The nation is commemorating the eleventh anniversary of the September 11, 2001 attacks which resulted in the deaths of nearly 3,000 people after two hijacked planes crashed into the World Trade Center, one into the Pentagon in Arlington, Virginia and one crash landed in Shanksville, Pennsylvania. (Photo by Alex Wong/Getty Images)
Other Slideshows
Photos: Cars dumped into water when bridge collapses
New photos from ground zero of Moore tornado
Frank Davis in the fight of his life
Photos: Forbes' list of most powerful women 
Photos: Crowds rock out on beach at Hangout Fest
Oklahoma tornado leaves dozens dead, including many children
