President Barack Obama waves as he walks across a grass field upon 

President Barack Obama waves as he walks across a grass field upon his arrival at McDonogh School in Owings Mills, Tuesday, June 12, 2012.  (AP Photo/Carolyn Kaster)
Associated Press
President Barack Obama waves as he walks across a grass field upon his arrival at McDonogh School in Owings Mills, Tuesday, June 12, 2012. (AP Photo/Carolyn Kaster)
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