Obama on Secret Service prostitution scandal: ‘a couple of knuckleheads’ responsible

Click image to see more photos. (AP/Carolyn Kaster) President Barack Obama on Tuesday praised the Secret Service agents who guard him as "incredible" and blamed "a couple of knuckleheads" for the Colombia prostitution scandal engulfing the agency. Obama, taping an appearance on "Late Night With Jimmy Fallon," also said he had met presumptive Republican presidential [...]