Giuliani on Trump's 9/11 Claim: He's Exaggerating Former NYC mayor is the latest person to refute Trump By Evann Gastaldo, Newser Staff Posted Dec 1, 2015 2:28 PM CST 92 comments Comments Donald Trump talks to Rudy Giuliani at a fundraising event in the Bronx borough of New York, Monday, July 6, 2015. (AP Photo/Seth Wenig) (Newser) – Donald Trump's claim that he saw thousands of New Jersey Muslims celebrating after the 9/11 attacks has been refuted by ... just about everyone, as Yahoo News reports. And as of Tuesday, "everyone" includes Rudy Giuliani, New York mayor when the attacks occurred. Though Giuliani acknowledges there were as many as 40 "pockets of celebrating" going on that day, there weren't thousands. "I would’ve known that for sure," he said during an appearance on CNN's New Day. "I think what he’s doing is exaggerating."