The US government has publicized classified information detailing the location, design and specifications of a launch site to be built from this summer for Israel’s new Arrow 3 anti-ballistic missile system. The details, apparently spilled in error, appear to include highly sensitive information relevant to the struggle against Iran’s nuclear ambitions. The material specifies, for instance, that the launch site must be completed by the end of next year, by which time, it says, Israel expects to have the Arrow 3 — a missile defense system crucial to Israel’s plans for countering an Iranian nuclear threat — operational. News of...