Friday’s talks between European ministers and Iran’s top diplomat, which aimed at de-escalating the fighting between the two adversaries, failed to produce a breakthrough.

However, the crown jewel of the Islamic Republic’s nuclear programme, a sprawling uranium enrichment facility built deep under a mountain in Fordow remains out of reach of Israel’s conventional weapons. It can only be destroyed with American “bunker-buster” bombs carried by B-2 Stealth fighters.