Washington DC, Oct. 21 -- US President Donald Trump on Wednesday (local time) said that stopping Iran from developing nuclear weapons stands among his administration's most significant achievements.

Emphasising the decisiveness required to confront the threat, President Trump told the reporters that if his administration had not done it, Iran would have "already used" the nuclear weapons.

"I think it's one of the greatest things that we've done - we've stopped Iran from having a nuclear weapon. It's one of the best things that we've done. It took a lot of courage to do it because no other President was willing to do it - and if we didn't do it, Iran would right now have already used massive nuclear weapons," he said.

His remarks come a...