05/18/2011 07:13 am ET Updated Jul 18, 2011

In Japan Reactor Failings, Danger Signs For The U.S.

Emergency vents that American officials have said would prevent devastating hydrogen explosions at nuclear plants in the United States were put to the test in Japan -- and failed to work, according to experts and officials with the company that operates the crippled Fukushima Daiichi plant.

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