U.S. keeps watchful eye as China builds 'Great Wall of Sand'

The crew of Pelican One keeps a watchful eye as the U.S. Navy patrol plane swoops low to identify a ship operating near waters off southwestern Japan that China now claims as its territory. After a radio check and a close look confirms the ship is a harmless Panama-flagged commercial tanker, Pelican One veers off and resumes a patrol that can last up to 12 hours and takes the plane thousands of miles from its base in Okinawa, Japan.

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