US says it will impose 'toughest sanctions in history' on Iran

By Jana Choukeir and Susan Heavey DUBAI/WASHINGTON, Aug 21 (Reuters) - U.S. Treasury chief Scott Bessent said the United States will impose "the toughest sanctions in history" on Iran, a move he suggested would lessen the need for new major military operations. Bessent's comments on Thursday followed President Donald Trump's threat a day earlier of "Economic Warfare" and warning of economic consequences against any country that provided "any type of lifeline to Iran." Bessent promised details…