Laura Rozen reports: Iran and six world powers remained far apart at the conclusion of two days of talks here without agreeing to meet again, but American and European diplomats said the Iranians had engaged more deeply than ever before on the details of a potential nuclear compromise.

“Two days of talks just concluded that were indeed quite substantive,” a senior US official, speaking not for attribution, told journalists at the conclusion of talks Saturday. “Each session involved a robust discussion….[that were] more natural and free-flowing than past talks.”

“I’ve never seen anything quite like it,” the US diplomat said. “There was intensive dialogue on key issues at the core of [the proposed confidence building measure.]. Both sides came away with better understanding of each others’ positions.” [Continue reading…]