In December of 1917, World War I was raging in europe.
On December the 6th at 9:04 AM, two ships collided in Halifax harbour.
The resulting explosion was the largest man made explosion in history until the US used nuclear weaponry in Japan.
Thousand of people were killed, and about a fifth of the city was leveled.
Here's a little history of what happened.
Money came in from around the world to help the citizens of Halifax, Nova Scotia.
The people of Nova Scotia sent a Christmas tree to Boston in 1918 to thank them for their selfless donation of money and volunteers.
In 1971, the province of Nova Scotia revived this tradition and ever since, have sent a very large Christmas tree to the city of Boston to be used in Boston Common as the city’s Christmas tree.
Every year people offer trees on their property to be chosen as the tree. They don’t send just any old tree however. There’s a selection process.
Here’s a link to this years lucky Nova Scotian, who is donating a 57 foot tall 70 year old tree from his property.
95 years after the explosion, and people still remember it.
-- In Fort McMurray Alberta