Red Sox pay tribute to marathon bombing victims

Boston Red Sox players stand during the national anthem during ceremonies marking the one-year anniversary of teh Boston Marathon bombings before a baseball game against the Baltimore Orioles in Boston, Sunday, April 20, 2014.

The Boston Red Sox paid tribute to those who were affected by the bombing with a special ceremony before Sunday's game.

The team and fans honored the three victims who lost their lives, the 264 who were injured, and police officer Sean Collier who was shot and killed by the bombers.

First responders and medical professionals also took part in the ceremony.