US President Barack Obama lays a wreath at the 9/11 Memorial on Ground Zero in New York on May 5, 2011. Obama took a defiant message to the New York epicenter of the 9/11 attacks Thursday, warning that Osama bin Laden’s death proved America will never fail to bring terrorists to “justice.” AFP PHOTO/Jewel Samad (Photo credit should read JEWEL SAMAD/AFP/Getty Images)