US officials have confirmed threats from Iran to assassinate Donald Trump had prompted increased security around him in recent weeks.
It appears unrelated to the assassination attempt in Pennsylvania over the weekend.
However, this has raised questions surrounding the apparent lapses that led to the shooter getting close enough to fire at Trump in the first place.
US correspondent Dan Mitchinson says the incident left behind plenty of unresolved questions.
LISTEN ABOVE

Gavin Grey: UK correspondent on Labour's poor showing at the local elections
03:41

Geoff Bertram: energy economist on the Greens calling for the Government to bring down power prices
05:43

Shane Solly: Harbour Asset Management expert on the market reactions to the 'no deal' announcement on the Middle East conflict
03:07