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UNITED STATES - May 1:  Brian Baum, 19, with flag, of Georgetown University, celebrates with classmates in Lafayette Park across from the White House after President Obama announced Osama bin Laden was killed in a U.S. military operation in Pakistan.  (Photo By Tom Williams/Roll Call)

UNITED STATES - May 1: Brian Baum, 19, with flag, of Georgetown University, celebrates with classmates in Lafayette Park across from the White House after President Obama announced Osama bin Laden was killed in a U.S. military operation in Pakistan. (Photo By Tom Williams/Roll Call)

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