An attendee interviewed by the BBC at the Pennsylvania campaign rally where former President Donald Trump was shot Saturday said he saw a man crawling on a roof with a rifle and tried to warn authorities. “We noticed a guy bear crawling up the roof” and he was carrying a rifle, the rally attendee told the news outlet, noting this was happening 50 feet away from him. The witness said that he tried to get the attention of law enforcement and wondered why Trump had not been pulled from the stage, given the clear security breach. “I’m standing there pointing at him for two to three minutes. Secret…