Thousands of Massachusetts Institute of Technology students, faculty and staff as well as law enforcement officials from across the nation are held a solemn tribute to fallen campus police officer ... more 
Thousands of Massachusetts Institute of Technology students, faculty and staff as well as law enforcement officials from across the nation are held a solemn tribute to fallen campus police officer Sean Collier. less 
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WCVB - Boston
Wed, Apr 24, 2013 5:51 PM EDT