A security officer guards an entrance at the Science Center at Harvard University in Cambridge, Mass., Monday, Dec. 16, 2013. Four buildings on campus were evacuated Monday after campus police ... more 
A security officer guards an entrance at the Science Center at Harvard University in Cambridge, Mass., Monday, Dec. 16, 2013. Four buildings on campus were evacuated Monday after campus police received an unconfirmed report that explosives may have been placed inside, interrupting final exams. (AP Photo/Elise Amendola) less 
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Associated Press | Photo By Elise Amendola
Mon, Dec 16, 2013 1:42 PM EST