The "We begin bombing in five minutes" contest

Following the North Korean missile test, the news is full of speculation (including by yours truly) that the next shoe to drop will be a nuclear test.  So we are starting the North Korea: Witness to Transformation "We begin bombing in five minutes" contest.  (Those too young to get the reference, just google it.)  The reader who most accurately predicts the next North Korean nuclear test wins an autographed copy of Witness to Transformation. One entry per reader, please.