From: Fox News
China has secretly built an underground nuclear submarine base in the South China Sea, posing a new threat to powers in the region — a development the Pentagon says it has known about for at least two years.
Satellite photos of the base obtained by FOX News show a large harbor and massive tunnels that defense experts say could shelter many nuclear subs. …
The secret base, known as Sanya, is located on the southern tip of Hainan Island in the South China Sea. Defense experts say the harbor feeds into waters so deep that the submarines could launch without having to surface, making it difficult to detect them from the sky.
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