The world should stand up to Washington’s bullying behavior, Iran’s foreign minister was quoted as saying on Sunday by state media in a letter to counterparts, as the top diplomat intensifies efforts to save a nuclear deal after a U.S. exit. U.S. President Donald Trump pulled out last month from the 2015 accord between Iran and world powers that lifted sanctions on Tehran in exchange for curbs to its nuclear program. The remaining signatories of the deal - France, Germany, Britain, Russia and China - still see the international accord as the best chance of stopping Tehran developing a nuclear...