By AARON PARSEGHIAN
The sound of bagpipes played and a sea of blue blanketed Main Street in Watertown, Massachusetts on Thursday, as firefighters from across Massachusetts gathered to honor one of their own.
Firefighter died of occupational cancer
Matthew Callahan, a Watertown firefighter since 2017, was remembered as a dedicated public servant who was always quick to smile. Callahan, 38, died last week of occupational cancer.
Watertown firefighters marched in front of his casket, as it made stops at each fire station in the city…