One retired FBI agent says Donald Trump’s claims of seeing Muslim celebrations following the attacks on 9-11 are absolutely plausible. Jim Burkett was an assistant special agent in charge with the FBI’s office in Boston during 9-11 and afterward. He says during that time the office received tons of phone calls from people who feared more attacks and others reporting suspicious activity. Many of those calls, said Burkett, came from concerned and angry Americans reporting Muslim’s celebrating over the destruction of the twin towers and damage to the Pentagon. The calls were logged, reports were made and there were “stacks...