Last week, China's coast guard mounted what the Philippines called an "unusual" show of force at Second Thomas Shoal, a hotly disputed submerged reef in the Spratly Islands where Manila maintains a small outpost in the form of the rusting warship BRP Sierra Madre, grounded there in 1999 to anchor its territorial claim.

The U.S. Coast Guard seized more than 75,000 pounds (34,000 kilograms) of illegal drugs this summer from boats far out to sea in the Pacific and Caribbean, which the service called its largest-ever haul worth nearly half a billion dollars.