U.S.

Associated Press
FILE - In this Aug. 23, 2011, file photo, a U.S. Park Service helicopter flies between the Washington Monument and the Capitol on the National Mall in Washington, following an earthquake in the Washington area. The unexpected jolt cracked the Washington Monument in spots and toppled delicate masonry high atop the National Cathedral. The shaking was felt far along the densely populated Eastern seaboard from Georgia to New England. While West Coast earthquake veterans scoffed at what they viewed as only a moderate temblor, last year’s quake has forever changed the way officials along the East Coast view emergency preparedness.(AP Photo/Jacquelyn Martin, File)

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