Environment

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FILE - In a Wednesday, Feb. 5, 2014 file photo, Duke Energy engineers and contractors survey the site of a coal ash spill at the Dan River Power Plant in Eden, N.C., as state and federal environmental officials continued their investigations of the spill into the river. North Carolina regulators said Friday, March 21, 2014, that they have asked a judge to withdraw a proposed settlement that would have allowed Duke Energy to resolve environmental violations by paying a $99,000 fine with no requirement that the $50 billion company clean up its pollution. (AP Photo/Gerry Broome, File)

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This March 20, 2014 photo made available by the North Carolina Department of Environmental and Natural Resources, shows a crack in an earthen dike holding back millions of gallons of coal ash and contaminated water at Duke Energy’s Cape Fear Plant in Moncure, N.C. On Friday, March 21, 2014, the state approved Duke’s emergency plan to repair the large crack. State environmental officials have issued a notice of violation against the company for illegally pumping 61 million gallons of contaminated water from a coal ash dump into the Cape Fear River. The new concerns come after a massive Feb. 2, 2014, coal ash spill at another Duke plant in Eden coated 70 miles of the Dan River in toxic gray sludge. (AP Photo/N.C. Department of Environment and Natural Resources)

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FILE - In a Dec. 22, 2013 file photo, Philadelphia Eagles' Michael Vick warms up before the first half of an NFL football game between the Philadelphia Eagles and the Chicago Bears, in Philadelphia. The New York Jets signed quarterback Michael Vick and released Mark Sanchez on Friday, March 21, 2014. Vick was a free agent after spending the last five seasons with the Phialdelphia Eagles. (AP Photo/Matt Rourke, File)

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The steel arch of the old Hoback Bridge, just south of Jackson, Wyo., crumbles into the Snake River after demolition crews used explosives to destroy the structure Thursday, March 20, 2014. The Wyoming Department of Trasportation will spend the next several days fishing the debris out of the river. (AP Photo / Jackson Hole News&Guide, Bradly J. Boner)

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Nevada Gov. Brian Sandoval, left, and Arizona Gov. Jan Brewer talk before a news conference, Friday, March 21, 2014, at Hoover Dam in Arizona. The two governors gathered to unveil signs that will be posted along the proposed Interstate 11. It was a symbolic effort meant to keep up momentum on the project, which is coming of age in an era of scarce highway funding. (AP Photo/Julie Jacobson)

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This undated photo shows Reno banker Roy Frisch, who disappeared in 1934. His whereabouts remain one of the city's greatest unsolved mysteries. (AP Photo/The Reno Gazette-Journal) NO SALES; NEVADA APPEAL OUT; SOUTH RENO WEEKLY OUT

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Rio 2016 Olympic Games Organizing Committee President Carlos Arthur Nuzman listens to questions during a press conference in Rio de Janeiro, Brazil, Friday, March 21, 2014. IOC officials are in Rio to monitor progress on the preparations for the 2016 Olympics. The city's mayor acknowledged that work on a large cluster of venues is far behind schedule. (AP Photo/Felipe Dana)

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Nawal El Moutawakel, head of the International Olympic Committee, IOC, Evaluation Commission answers a question during a press conference in Rio de Janeiro, Brazil, Friday, March 21, 2014. IOC officials are in Rio to monitor progress on the preparations for the 2016 Olympics. The city's mayor acknowledged that work on a large cluster of venues is far behind schedule. (AP Photo/Felipe Dana)