Police officers and civilians arrive to a memorial service for fallen Massachusetts Institute of Technology campus officer Sean Collier at MIT in Cambridge, Mass. Wednesday, April 24, 2013. ... more 
Police officers and civilians arrive to a memorial service for fallen Massachusetts Institute of Technology campus officer Sean Collier at MIT in Cambridge, Mass. Wednesday, April 24, 2013. Authorities say Collier was killed by the Boston Marathon bombing suspects last Thursday. He had worked for the department a little more than a year. (AP Photo/Elise Amendola) less 
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Associated Press | Photo By Elise Amendola
Wed, Apr 24, 2013 2:22 PM EDT