 The security services are investigating how the gunman, 20-year-old Thomas Matthew Crooks, was able to get so close. He was shot dead by a Secret Service sniper, having shot and injured the former president. In this programme, we'll consider the questions facing Mr Trump's protection detail and what the attempted assassination means for the race for the White House. Our first report comes from Gary O'Donoghue, who was at the rally when the shots rang out.