People look up at a downtown building after an earthquake was felt in Baltimore, Tuesday, Aug. 23, 2011. Downtown office buildings were cleared and workers were waiting for clearance to re-enter. (AP ... more 
People look up at a downtown building after an earthquake was felt in Baltimore, Tuesday, Aug. 23, 2011. Downtown office buildings were cleared and workers were waiting for clearance to re-enter. (AP Photo/Patrick Semansky) less 
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Associated Press | Photo By Patrick Semansky
Tue, Aug 23, 2011 2:29 PM EDT