nuclear nuclear

Secretary of Energy Rick Perry testifies during a House Energy and Commerce Committee hearing on Capitol Hill in Washington, D.C., on Oct. 12. Perry's proposed rule to benefit nuclear and coal power plants has been rejected by a federal regulatory commission. Drew Angerer/Getty Images hide caption

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Drew Angerer/Getty Images

A Hawaii Civil Defense Warning Device, which sounds an alert siren during natural disasters, is shown in Honolulu on Nov. 29, 2017. The alert system is tested monthly, but now Hawaii residents will hear a new tone designed to alert people of an impending nuclear attack by North Korea. Caleb Jones/AP hide caption

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Caleb Jones/AP

Nuclear Strike Drills Faded Away In The 1980s. It May Be Time To Dust Them Off

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A sign warns people not to enter the town of Ozersk, Chelyabinsk region, Russia, which houses the Mayak nuclear facility. In 1957, the nuclear reprocessing plant was the site of one of the world's worst nuclear accidents. Katherine Jacobsen/AP hide caption

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Katherine Jacobsen/AP

The core of the RBT-3 reactor at the Research Institute of Atomic Reactors in Dimitrovgrad, Russia. Some scientists suspect the institute's work on medical isotopes might explain radioactivity detected over Europe. Sovfoto/UIG via Getty Images hide caption

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Sovfoto/UIG via Getty Images

Clues In That Mysterious Radioactive Cloud Point Toward Russia

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Kikue Takagi, left, narrowly survived the Hiroshima atomic bombing as a schoolgirl. She's now 83. Her second cousin is U.S. Rep. Mark Takano, a Democrat from southern California. His grandparents and parents were all placed in U.S. internment camps in World War II. In this photo from last year, they are at a restaurant in Hiroshima, where he visited her. Courtesy of Mark Takano hide caption

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Courtesy of Mark Takano

Members of the 320th Missile Squadron missile combat crew work through a scenario in the 90th Operations Support Squadron's Missile Procedure Trainer on F.E. Warren Air Force Base, Wyo., in June 2014. The MPT is a simulator that allows missile crews to practice contingencies they might face while on alert. R.J. Oriez/U.S. Air Force hide caption

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R.J. Oriez/U.S. Air Force

South Korean people watch a television broadcast at the Seoul Railway Station earlier this month reporting North Korea's surface-to-air missile launch. Woohae Cho/Getty Images hide caption

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Woohae Cho/Getty Images

Castle Romeo was an American hydrogen bomb test in March 1954 at Bikini Atoll in the Pacific. It was 11 megatons, or roughly 1,000 times more powerful than North Korea's test on Wednesday. North Korea says it was a hydrogen bomb test, though the White House says it doubts the claim. Galerie Bilderwelt/Getty Images hide caption

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Galerie Bilderwelt/Getty Images

The U.S. Isn't Buying North Korea's Claim Of An H-Bomb Test

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North Korean leader Kim Jong Un waves during a parade in Pyongyang, North Korea, in October. The country said it carried a successful hydrogen bomb text on Wednesday morning, but many analysts are skeptical. Wong Maye-E/AP hide caption

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Wong Maye-E/AP

Chinese Foreign Minister Wang Yi delivers a speech during the international seminar commemorating the 10th anniversary of the September 19 joint statement of six-party talks at the Diaoyutai State Guesthouse in Beijing, China, on Saturday. Kim Kyung-hoon/Reuters/Landov hide caption

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Kim Kyung-hoon/Reuters/Landov

President Obama listens to Israeli Prime Minister Benjamin Netanyahu during their March 22, 2013, visit to a Holocaust memorial in Jerusalem. Pablo Martinez Monsivais/AP hide caption

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Pablo Martinez Monsivais/AP