Fresh uncertainty has emerged around the U.S.-Iran peace process as Tehran signals it has not yet decided whether to attend implementation talks in Switzerland. The hesitation comes as Israel continues military strikes in Lebanon despite provisions in the newly signed memorandum aimed at ending the conflict. Iranian officials have also insisted that the Strait of Hormuz remains exclusively under Tehran’s responsibility and warned against outside involvement. With Pakistan and Qatar expected to mediate and Donald Trump warning that bombing could resume if talks fail, questions are growing over whether Benjamin Netanyahu's actions could derail Washington's biggest diplomatic gamble.