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  Tests are ‘act three in tragedy,’ professor says

Will the new cap work? Physics professor Dr. Michio Kaku weighs in on containment-cap testing and explains that engineers are correctly taking their time to get this right.

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A child cools off in spraying water from a fire hydrant in the Kensington neighborhood of Philadelphia
A child cools off in spraying water from a fire hydrant in the Kensington neighborhood of Philadelphia

A person cools off in spraying water from a fire hydrant in the Kensington neighborhood of Philadelphia, Tuesday, July 6, 2010. The East Coast broiled under an unforgiving sun Tuesday as the temperature soared above 100 degrees in several cities.

A person cools off in spraying water from a fire hydrant in the Kensington neighborhood of Philadelphia
A person cools off in spraying water from a fire hydrant in the Kensington neighborhood of Philadelphia

A person cools off in spraying water from a fire hydrant in the Kensington neighborhood of Philadelphia, Tuesday, July 6, 2010. The East Coast broiled under an unforgiving sun Tuesday as the temperature soared above 100 degrees in several cities, utility companies cranked out power to cool the sweat

People play in spraying water from a fire hydrant in the Kensington neighborhood of Philadelphia (Matt Rourke / AP)
People play in spraying water from a fire hydrant in the Kensington neighborhood of Philadelphia (Matt Rourke / AP)

People play in spraying water from a fire hydrant in the Kensington neighborhood of Philadelphia, Tuesday, July 6, 2010. The East Coast broiled under an unforgiving sun Tuesday as the temperature soared above 100 degrees in several cities, utility companies cranked out power to cool the sweating mas

A woman swings a child through the spray from a fire hydrant during a heat wave in the Brooklyn section of New York
A woman swings a child through the spray from a fire hydrant during a heat wave in the Brooklyn section of New York

A woman swings a child through the spray from a fire hydrant during a heat wave in the Brooklyn section of New York July 6, 2010. REUTERS/Jessica Rinaldi (UNITED STATES - Tags: ENVIRONMENT SOCIETY IMAGES OF THE DAY)