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Italy's Fabio Fognini celebrates his victory over Spain's Tommy Robredo at a Buenos Aires' Copa Claro Open semifinal tennis match in Buenos Aires, Argentina, Saturday, Feb. 15, 2014. (AP Photo/Victor R. Caivano)

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Spain's Nicolas Almagro complains to the umpire about a call during a Buenos Aires' Copa Claro Open semifinal tennis match with Spain's David Ferrer in Buenos Aires, Argentina, Saturday, Feb. 15, 2014. (AP Photo/Victor R. Caivano)

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Spain's David Ferrer Spain returns the ball to Spain's Nicolas Almagro at a Buenos Aires' Copa Claro Open semifinal tennis match in Buenos Aires, Argentina, Saturday, Feb. 15, 2014. (AP Photo/Victor R. Caivano)

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Spain's Tommy Robredo returns the ball to Italy's Fabio Fognini at a Buenos Aires' Copa Claro Open semifinal tennis match in Buenos Aires, Argentina, Saturday, Feb. 15, 2014. (AP Photo/Victor R. Caivano)

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Italy's Fabio Fognini eyes the ball during a Buenos Aires' Copa Claro Open tennis semifinal match against Spain's Tommy Robredo in Buenos Aires, Argentina, Saturday, Feb. 15, 2014. (AP Photo/Victor R. Caivano)

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Italy's Fabio Fognini celebrates a point during his Buenos Aires' Copa Claro Open semifinal tennis match with Spain's Tommy Robredo in Buenos Aires, Argentina, Saturday, Feb. 15, 2014. (AP Photo/Victor R. Caivano)

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A drop of rain clings to the blossom of a snowdrop in Wake Forest, N.C., on Saturday, Feb. 15, 2014. Two days after a winter storm paralyzed much of the South, the region resumed its limp toward spring. (AP Photo/Allen G. Breed)

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FILE - The first load of nuclear waste arrives in this March 26, 1999 file photo, at the Waste Isolation Pilot Plant (WIPP) site in Carlsbad, N.M., from Los Alamos National Labs. Officials monitoring the presence of airborne radiation at the underground site in southeastern New Mexico where the federal government seals away its low-grade nuclear waste said late Saturday Feb. 15, 2014 that surface tests have shown no danger to people or the environment. Samples were taken at several sites around the Waste Isolation Pilot Plant after an air monitor detected radiation on the underground levels of the facility around 11:30 p.m. Friday, the U.S. Department of Energy said in a news release. (AP Photo/Thomas Herbert)

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Monika Czerniec, left, art restoration expert, paints elaborate wall paintings that tell the story of Poland’s Jewish community at the new Museum of the History of Polish Jews in Warsaw, Poland, Monday, Feb. 17, 2014. The museum, largely paid for by Poland’s government, aims to reconstruct the climate of Jewish towns and synagogues through historical objects, multimedia, images, replicas, models and quotations from chronicles and diaries. On Monday, specialists were working on wall paintings representing small Jewish towns. (AP Photo/Czarek Sokolowski)

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Monika Czerniec, art restoration expert, paints elaborate wall paintings that tell the story of Poland’s Jewish community at the new Museum of the History of Polish Jews in Warsaw, Poland, Monday, Feb. 17, 2014. The museum, largely paid for by Poland’s government, aims to reconstruct the climate of Jewish towns and synagogues through historical objects, multimedia, images, replicas, models and quotations from chronicles and diaries. On Monday, specialists were working on wall paintings representing small Jewish towns. (AP Photo/Czarek Sokolowski)

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Monika Czerniec, art restoration expert, paints elaborate wall paintings that tell the story of Poland’s Jewish community at the new Museum of the History of Polish Jews in Warsaw, Poland, Monday, Feb. 17, 2014. The museum, largely paid for by Poland’s government, aims to reconstruct the climate of Jewish towns and synagogues through historical objects, multimedia, images, replicas, models and quotations from chronicles and diaries. On Monday, specialists were working on wall paintings representing small Jewish towns. (AP Photo/Czarek Sokolowski)

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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. A legislative oversight committee has called for officials from the N.C. Department of Environment and Natural Resources to appear at a hearing on Monday, Feb. 17, 2014 to talk about the spill. North Carolina lawmakers State Senate Rules Chairman Tom Apodaca and House Environment Committee Vice-Chairman Chuck McGrady say they will co-sponsor a bill seeking the removal of coal ash dumps like the one that ruptured Feb. 2. (AP Photo/Gerry Broome, File)

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President Barack Obama speaks to the media on California's drought situation Friday, Feb. 14, 2014 in Los Banos, Calif. Farmers in California's drought-stricken Central Valley said the financial assistance President Barack Obama delivered on his visit Friday does not get to the heart of California's long-term water problems. (AP Photo/Los Angeles Times, Wally Skalij, Pool)

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A sercret service agent looks over a farm field as President Barack Obama speaks to the media on California's drought situation Friday, Feb. 14, 2014 in Los Banos, Calif. Farmers in California's drought-stricken Central Valley said the financial assistance President Barack Obama delivered on his visit Friday does not get to the heart of California's long-term water problems. (AP Photo/Los Angeles Times, Wally Skalij, Pool)

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This Jan. 29, 2014 photo provided by the California Department of Fish and Wildlife shows more than a ton of illegal shark fins that were seized from a vendor in San Francisco. Michael Kwong, 42, of Kwong Yip Inc. was cited for having 2,138 pounds (970 kilograms) of the fins, which violates California's ban that went into effect last July. Possessing shark fins, selling or trading them is a misdemeanor under California's law. Conservation groups have estimated that 73 million sharks are killed each year globally for their fins, which are often cut from live animals. (AP Photo/California Dept. of Fish and Wildlife)

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File - This Nov. 14, 2008 file photo shows former Alaska Territorial Gov. Mike Stepovich, right, and former Alaska Gov. Sarah Palin as they wait for a ceremony to honor Alaska governors as part of Alaska's 50th anniversary in Anchorage, Alaska. Former Alaska territorial Gov. Mike Stepovich has died at the age of 94. His daughter, Antonia Stepovich Gore, tells The Associated Press that he died early Friday morning at a hospital in San Diego. He had been hospitalized since suffering head injuries in a fall last Saturday night. (AP Photo/Al Grillo, file)

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President Barack Obama and Rep. Jim Costa, D-Calif. walk from the Marine One helicopter toward Air Force One before traveling to Fresno, Calif., to discuss the ongoing drought, Friday, Feb. 14, 2014, at Andrews Air Force Base, Md. (AP Photo/Jacquelyn Martin)