Washington is preparing to intensify its economic campaign against Tehran, with the US Treasury secretary signalling measures aimed at disrupting Iran’s oil trade and putting pressure on countries that continue doing business with the country. Aug 20 (Reuters) - The United States will impose "the toughest sanctions in history" on Iran,U.S. Key points and original sources are listed below.

• Washington is preparing to intensify its economic campaign against Tehran, with the US Treasury secretary signalling measures aimed at disrupting Iran’s oil trade and putting pressure on countries that continue doing business with the country. China, Iran’s bi...S1

• Aug 20 (Reuters) - The United States will impose "the toughest sanctions in history" on Iran,U.S. Treasury Secretary Scott Bessent said on Thursday as he urged Beijing to cooperate with Washington.Bessent said he would hold a press conference on Monday to disc...S2