Trump: That's why I didn't approve of the Iran attack.

Speaking of NBC, Trump showed why he had decided to change his mind and not attack some of the Iranian targets.

I asked the generals how many people would be killed and they told me there would be 150. They shot a drone or a plane without a pilot whatever you call it, and I thought it wasn't proportional”, Trump said.

President Trump has said he does not want war, but warned Iran that he will face “the implementation” if the conflict erupts.

Tensions between Tehran and Washington have risen significantly after Iran's collapse of an American threat, which the US says was in international airspace, but Iran insists was in its airspace.