Secret Service Identified Rooftop as Potential Vulnerability Before Rally

The rooftop where a shooter positioned himself before nearly assassinating former President Donald Trump Saturday at a campaign rally in Pennsylvania was identified as a potential vulnerability in the days before the event, according to a report. Two sources “familiar with the agency’s operations” told NBC News that the Secret Service was aware of the risks associated with the rooftop, which tops a glass research company next to the Butler Farm Show where the rally was taking place. “Someone should have been on the roof or securing the building so...