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Reply to @ghuzmeli: The airport isn't on Spratly Island, it's on Swallow Reef, which was built up into an artificial island by Malaysia:
Spratly Island is administered by Vietnam as a part of Khanh Hoa. See at http://en.wikipedia.org/wiki/Spratly_Island_(proper)
Thanks, Paul -- I've merged them.
This territory is claimed by Malaysia, China, the Philippines, and Vietnam. Malaysia currently has effective control, with this airport on a man made island, a small naval base, and a diving resort.
This appears to be a duplicate of RP10, Shallow Reef Airport, Spratly Islands.