Ned Wallace of the National Park Service stands over a manhole at the base of the Washington Monument in Washington, Tuesday, March 13, 2012, containing a smaller obelisk in a well 12-feet deep which ... more 
Ned Wallace of the National Park Service stands over a manhole at the base of the Washington Monument in Washington, Tuesday, March 13, 2012, containing a smaller obelisk in a well 12-feet deep which was used as a geodetic marker and referred to as "the mini monument". Government surveyors are collecting data around the Washington Monument and other sites on the National Mall that will reveal whether it has sunk or tilted since last yearís earthquake. (AP Photo/Charles Dharapak) less 
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Associated Press | Photo By Charles Dharapak
Tue, Mar 13, 2012 7:01 PM EDT