Iran and the United States made "significant progress" during talks in Switzerland on Thursday, according to mediators, with both sides agreeing to resume negotiations in Austria next week.
Washington is demanding curbs on Iran's missile programme, its network of regional proxies, and above all its nuclear capabilities - a demand that carries a particular historical irony, given that it was the United States itself that launched Iran's nuclear ambitions in 1953 under Eisenhower's Atoms for Peace initiative.
