patrol

And in August, a Chinese navy vessel collided with one from its own coast guard while chasing a Philippine patrol boat near the same shoal.

Canadian and U.S. aircraft last year intercepted Chinese and Russian bombers in international airspace near Alaska, the first joint patrol between the two in the approaches to North America.

Illegal crossings at the southern border have reached historic lows, and agents long tasked with guarding that stretch now patrol faraway cities.

It will buy two new Arctic ships, maritime patrol planes, drones and early warning radar.

Denmark will spend $4 billion to protect the Arctic, including buying or leasing two new Arctic ships, a number of maritime patrol aircraft and drones, according to Danish officials.