Whether through diplomacy — it’s preferred route — or a potential military option, Washington is “intent on guaranteeing” that Iran won’t get a nuclear weapon, said US Secretary of State John Kerry.

In an interview with Israel’s Channel 10 broadcast Sunday evening, Kerry sought to assure Israel and Gulf Cooperation Council (GCC) allies that Washington will “defend them” in the face of Iranian aggression.

He alluded to the recently upgraded Boeing-built GBU-57, a 30,000-pound bunker-buster known as Massive Ordnance Penetrator, as part of an American military option that has not been taken off the table as the United States and world powers seek to conclude a comprehensive deal with Tehran by the end of June. […]