 Donald Trump at a rally Saturday in Pennsylvania in a devastating failure of one of the agency's core duties. The FBI Sunday identified the shooter as 20-year-old Thomas Crooks of Bethel Park, Pennsylvania. The gunman, who officials said was killed by a Secret Service personnel, fired multiple shots at the stage from an elevated position outside of the rally venue, according to the agency. It came after warnings, according to a rally-goer who spoke to the BBC. We noticed a guy crawling...