Amanda Diaz, bottom left, reads a book as Ciara Perez, top left, and Chris Elam sit in a tree during the unseasonably warm weather in the Rittenhouse Square park Tuesday, March 13, 2012 in ... more 
Amanda Diaz, bottom left, reads a book as Ciara Perez, top left, and Chris Elam sit in a tree during the unseasonably warm weather in the Rittenhouse Square park Tuesday, March 13, 2012 in Philadelphia. (AP Photo/Alex Brandon) less 
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Associated Press | Photo By Alex Brandon
Tue, Mar 13, 2012 5:54 PM EDT