Jerusalem is increasingly jittery that cracks are appearing in the nearly half-century-old US policy of upholding Israel’s right to maintain its “nuclear ambiguity,” following reports that Israeli nuclear capabilities are, for the first time, scheduled to be on the agenda of the International Atomic Energy Agency’s (IAEA) board meeting next month. One diplomatic official said that the US has relayed messages to Israel that it will not let its nuclear position be harmed, but added that these assurances are being received with some skepticism amid the realization that while in the past the US has killed such discussions in international...