April 15, 2014 1:10 pm MIT Strong: Boston group running marathon in honor of fallen officer The group will run on behalf of Officer Sean Collier US & World Videos 0:21 Helicopter crashes in woods near Danbury home, pilot injured 1:13 Firefighters respond to 5-alarm fire in Chelsea 2:47 Brian Higgins, witness in Karen Read trial, explains why he destroyed his cell phone 0:39 Warwick officer shoots dog after attack 2:07 Same-sex marriage: Cambridge marks 20 years since the first in Mass.