"Suspicious devices" were found in the car of Thomas Crooks, the gunman who tried to assassinate Donald Trump on Saturday night
Crooks, 20, was shot and killed by the Secret Service at the rally
Trump says he was shot in the ear, describing a "bullet ripping through skin"
The former president called on Americans to "stand united" after the attack
A witness told the BBC he saw a man with a rifle crawling on a roof before shots rang out, and that he tried to warn police
The Oversight Committee in the US Congress has summoned the Secret Service director, saying "Americans demand answers"
One spectator was killed at the rally and two others were critically injured