 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 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 the guy crawling...