Washington Post – The U.S. military yesterday moved ships into position off the coast of North Korea to detect the launch of any long-range ballistic missiles and prepared its new, unproven missile-interception system to attempt a response if necessary.

Two U.S. Navy ships with sensors that could swiftly detect and track a missile’s flight were operating off the North Korean coast yesterday, a Pentagon official said. They are the USS Curtis Wilbur and the USS Fitzgerald, both Arleigh Burke-class guided-missile destroyers based at Yokosuka, Japan.
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