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The White House insists that Obama is making his first trip to Israel next month to assure the Jewish state that if push comes to shove with Iran, he will have Israel’s back. But North Korea’s nuclear test Tuesday morning could indicate that it’s already too late for that. If North Korea has the bomb, then for all practical purposes Iran does, too. If that’s so, then Obama’s policy of prevention has failed, and containment—a policy that the president has repeatedly said is not an option—is in fact all Washington has.