MIT Police Sergeant Cheryl Vossmer cheers as a couple swing dances during the Boston Pops concert. Several other onlookers, including the flag-waver, sport “Collier Strong” shirts. Greg Steinbrecher—The Tech May. 9, 2016 Facebook Twitter Reddit Print MIT Police Sergeant Cheryl Vossmer cheers as a couple swing dances during the Boston Pops concert. Several other onlookers, including the flag-waver, sport “Collier Strong” shirts. Greg Steinbrecher—The Tech