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Jeff Donn

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AP IMPACT: US health care unprepared for Ebola

Jeff Donn, Garance Burke

This March 16, 2011 photo shows steam rising from cooling towers at Exelon Corp.'s nuclear plant in Byron, Ill. Illinois has six nuclear plants, with a total of 11 reactors, more than any other state in the U.S. in 2010. Exelon, which has acknowledged violating Illinois state groundwater standards, agreed to pay $1.2 million to settle state and county complaints over the tritium leaks in Illinois' Braidwood, Dresden and Byron sites. The NRC also sanctioned Exelon. (AP Photo/Robert Ray) (AP)

Tritium leaks found at many nuke sites

Jeff Donn

U.S. nuclear regulators weaken safety rules

Jeff Donn

Medical workers in protective gear gather around an ambulance which arrived at a hospital in Fukushima City, Fukushima Prefecture, Japan, carrying two workers from the tsunami-damaged Fukushima Dai-ichi nuclear power plant after they stepped into contaminated water while laying electrical cables in one unit Thursday, March 24, 2011. (AP Photo/Yomiuri Shimbun, Jun Yasukawa) JAPAN OUT, MANDATORY CREDIT (AP)

Dangerous breach suspected at Fukushima

Jeff Donn, Shino Yuasa

The oil slick in the Mississippi Delta as seen from space on May 24, 2010.

Workers describe failures on Gulf oil rig

Mike Baker, Michael Kunzelman, Jeff Donn