Failing that, the USS John McCain could closely follow the ship until it reaches a port.

如果该船仍不听从，约翰·麦凯恩号有权紧随它直到其到达港口。

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The North American Aerospace Defense Command, or NORAD, which has responsibility for U.S. homeland defense, is watching the region via satellite and the USS Fitzgerald and the USS John S. McCain, Navy destroyers armed with sophisticated missile defense systems, have been positioned to best be able to detect and track a missile launch.

NPR: A Look At The North Korea Crisis