Washington, April 24 -- US President Donald Trump on Thursday ruled out striking Iran with a nuclear weapon, after his previous threats to completely destroy Iranian civilization.

"No, I wouldn't use it," Trump told reporters at the White House.

"Why would I use a nuclear weapon when we've, in a very conventional way, decimated them without it?" he asked.

"A nuclear weapon should never be allowed to be used by anybody."

Trump on April 7 issued a genocidal threat to Iran that a "whole civilization will die tonight, never to be brought back," but within hours agreed to a ceasefire that he has since extended in the war launched by the United States and Israel.

Vice President JD Vance during the conflict warned that the United States was...