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

McCain, who survived two plane crashes and a massive fire aboard the USS Forrestal before his A-4 Skyhawk fighter-bomber was shot down over Hanoi in 1967, said he had not given much thought to the possibility of threats to his life as a high-profile presidential candidate.

CNN: Life on the Straight Talk Express: All McCain, all of the time