Second-by-second: The attempted assassination of Trump

Flanked by the secret service and circled by police officers, law enforcement was meant to keep Donald Trump safe at his rally in Butler Pennsylvania on 13 July.

But somehow, 20-year-old Thomas Matthew Crooks came within centimetres of assassinating him. Director of the Secret Service Kimberley Cheatle has told ABC News the shooting was ‘unacceptable’. Homeland Security called it a ‘security failure’.

In this visual investigation, we’re going to show you, using footage from multiple angles and sources, what was happening while Trump was speaking and, second by second, when the threat to Donald Trump’s life was first identified.

Building a detailed picture of exactly how law enforcement reacted before and immediately after shots were fired. And a warning, there are some distressing images in this video.