Washington

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FILE - In this April 27, 2013 file photo, President Barack Obama speaks at the White House Correspondents' Association Dinner at the Washington Hilton Hotel in Washington. Obama was set to join journalists, government officials, politicians and media personalities Saturday night at the White House Correspondents' Association dinner for an evening of humor and celebrity gazing that has become an annual tradition in the nation’s capital (AP Photo/Carolyn Kaster)

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** FILE ** FILE President Barack Obama speaks at the White House Correspondents' Association Dinner at the Washington Hilton Hotel in Washington, April 27, 2013. (Associated Press)

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People enjoy warm weather at Constitution Gardens on the National Mall in Washington, Friday, May 2, 2014. For years, the mall's grounds and facilities have fallen into disrepair, even though it's is the most-visited national park. Visitors often find dead grass, broken sidewalks and fetid pools of water. (AP Photo/Jacquelyn Martin)

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A worker, who asked not to be named, paints the stage of the Sylvan Theater with the Washington Monument in the background, on the National Mall in Washington, Friday, May 2, 2014. The Washington Monument is scheduled to reopen May 12 after earthquake damages were repaired. For years, the mall's grounds and facilities have fallen into disrepair, even though it's is the most-visited national park. Visitors often find dead grass, broken sidewalks and fetid pools of water. (AP Photo/Jacquelyn Martin)

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A woman rides a bicycle past pooling trash and pollen in the lake at Constitution Gardens on the National Mall in Washington, Friday, May 2, 2014. For years, the mall's grounds and facilities have fallen into disrepair, even though it's is the most-visited national park. Visitors often find dead grass, broken sidewalks and fetid pools of water. (AP Photo/Jacquelyn Martin)