Halifax Explosion: Minute by Minute

100 years ago, the Canadian port city of Halifax was struck by one of the largest non-nuclear explosions in history. How did it happen?

For more about the Halifax explosion, check out these links:
https://novascotia.ca/archives/explosion/explosion.asp
http://newsinteractives.cbc.ca/halifaxexplosion/
http://www.halifaxexplosion.net/halifaxexplosion/blastcloud5.html
http://www.halifaxexplosion.org/