Secret Service investigates how gunman was able to get so close to Trump

The US Secret Service is investigating how a gunman armed with an AR-style rifle was able to get close enough to shoot and injure former president Donald Trump at a rally on Saturday in Pennsylvania, a monumental failure of one of the agency’s core duties.
The gunman, who was killed by Secret Service personnel, fired several shots at the stage from an “elevated position outside of the rally venue”, the agency said.