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A zone of a couple hundred square miles in the East China Sea is at the heart of growing tensions between China and its neighbors South Korea and Japan, along with the U.S. CNN's RenĂ© Marsh explains what an air defense zone is and why the U.S. does not recognize the one China declared just last week.
The Chinese extended military control into an area the U.S. defines as international airspace, and in response, America is standing its ground - flying two B-52 bombers through the zone and issuing a stern warning through the new ambassador to Japan, Caroline Kennedy. CNN's Barbara Starr reports on the on-going tension.
Two U.S. warplanes flew over the East China Sea in a disputed area that despite Japan's protestations, China is claiming as an air defense zone. CNN's Barbara Starr reports.
CNN's Tom Foreman looks at whether North Korea's claims that it can strike U.S. bases in Japan and Guam are realistic.
The damage is not radioactive but the debris field still poses a danger to marine life as it inches toward North America.
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Millions of tons of debris washed out to sea by the Japanese tsunami is headed for the U.S. CNN's Chad Myers reports.