Approved the raid that found and killed Osama bin Laden, set policy that U.S. would no longer use harsh interrogation techniques, a practice that had essentially ended late in George W. Bush's presidency. Largely carried forward Bush's key anti-terrorism policies, including detention of suspects at Guantanamo Bay despite promise to close the prison. Expanded use of unmanned drone strikes against terrorist targets in Pakistan and Yemen.
Romney: No constitutional rights for foreign terrorism suspects. In 2007, refused to rule out use of waterboarding to interrogate terrorist suspects. In 2011, his campaign said he does not consider waterboarding to be torture.
Ken Fairben holds a photo showing his son Keith, left, a victim of the Sept. 11, 2001 attacks, posing with his mother Diane Fairben. (AP Photo/Bebeto Matthews)