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.

South Korean President Lee Jae Myung will meet President Donald Trump for their first summit Monday, with a deal to boost U.S. shipbuilding and cooperation front and center.

South Korean President Lee Jae Myung is leaning on promises to "Make America Shipbuilding Great Again" during his first official U.S. trip, as the two allies wrangle over other details of their trade and security agreements.