Trump says Iran faces 'decapitation' if it doesn't strike deal

WASHINGTON, Aug 3 (Reuters) - U.S. President Donald Trump on Monday said Iran faced "decapitation" if it did not agree a pact to end the conflict between the two nations, saying Tehran had one last chance to strike a deal. "I think we're going to maybe get something, but I want to give them every last chance before decapitation," he said, reiterating a threat to launch a major attack on Iran. Earlier on Monday, after Iran said there were no talks under way, Trump slammed what he called Iran's…