Former US President Donald Trump was the target of an apparent assassination attempt on July 13 at a Pennsylvania rally, days before he was to accept the Republican nomination for a third time. A barrage of gunfire set off panic, and a bloodied Trump, who said he was shot in the ear, was surrounded by Secret Service and hurried to his SUV as he pumped his fist in a show of defiance. The Secret Service, which was initially handling the case, said it was investigating the incident as an attempted assassination. The FBI, which has now taken over the probe, has identified the shooter as 20-year-old Thomas Matthew Crooks of Pennsylvania. The United States is not new to political violence. The attack on Trump is one of more than a dozen attacks on American presidents, presidents-elect or presidential candidates in US history.Watch for more details.00:00 – Introduction00:12 – Assassination attempt against Donald Trump3:53 – Not the first presidential attack in US6:36 – Political polarisation in an armed nation