Is East Coast prepared for truly powerful quake?

Ted Tuz, a Pennsylvania Dept. of Transportation contractor with Pickering, Corts, and Summerson, Inc., inspects an Interstate 95 overpass Wednesday, Aug. 24, 2011, in Philadelphia. Inspectors across the state are making spot checks on bridges, roads, dams and more in the aftermath of tremors from the 5.8 magnitude quake that was centered in Virginia. (AP Photo/Alex Brandon)

August 24, 2011 10:00:03 PM PDT
There was a crack in the Washington Monument, and capstones were broken at the National Cathedral. In the District of Columbia suburbs, some people stayed in shelters because of structural concerns at their apartment buildings.

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