Lt. Garrett Malloy (left) and Sgt. Tyler MacDonald of the Londonderry Police Department on Boylston Street in Boston following the 130th running of the Boston Marathon on April 20. Malloy and MacDonald ran as members of Team Collier honoring the memory of MIT Police Officer Sean Collier, who was murdered by terrorist Tamerlan Tsarnaev three days after the Boston Marathon bombings in 2013. Courtesy photo/Londonderry Police Department