As alleged Boston bomber Dzhohkar Tsarnaev was about to be arraigned, Rudy Giuliani told Congress Wednesday that "political correctness" by the Obama administration may have thwarted efforts to stop the Boston attack.

Testifying before the House Homeland Security Committee, the former New York mayor complained that the administration has become too cautious about identifying potential Islamic terror threats.

"You can't fight an enemy you don't acknowledge," Giuliani told the hearing, which was called to examine intelligence breakdowns that might have allowed the Boston bombers to carry out their attack.

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