Nova Scotia tree lights up Boston Common

The story of Nova Scotia's Tree for Boston will be told through a monument unveiled on Boston Common to honour the 100th Anniversary of the Halifax Explosion.

Premier Stephen McNeil was joined by Boston Mayor Martin Walsh for Thursday's ceremony.

The annual tree lighting and gift of a Christmas tree to Boston is an annual expression of gratitude for New England's help in the aftermath of the explosion.

The December 6th, 1917 blast killed two thousand people and left thousands more injured and homeless.