Why the U.S. is worried about China’s land grab

Aired: 4/17/2015 | 0:05:40 | Clip
Tensions among some Asian nations are growing after satellite images showed that China has been building up small islands in a disputed area of the South China Sea. Judy Woodruff talks to retired Adm. Dennis Blair, former commander of the U.S. Pacific Command, to learn more about the contested area and the U.S. response.

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