World powers will assess over the next few days whether Iran is serious in nuclear negotiations after it indicated it was ready to continue talks on the basis of texts that had been agreed at the last round in June, a European source said on Friday. Talks on reviving the 2015 Iran nuclear deal resumed on Thursday with the United States and Israel ramping up the rhetorical pressure on Tehran about the possible economic or military consequences if diplomacy fails. Iran’s top negotiator said Tehran was sticking to the stance it laid out last week when the talks broke off with European and U.S. officials accusing Iran of making new demands and of reneging on compromises worked out earlier this year. […]