Turns out even the tiniest of screw-ups can result in major problems. From metric math mistakes at NASA to impatient generals dooming their own men, this is our list of 10 Tiny Mistakes That Caused Disasters.

Halifax has voted to give train dispatcher Vincent Coleman a posthumous honour for his role in saving hundreds during the Halifax Explosion.

The Halifax Explosion happened Dec. 6, 1917, when two ships collided in the Halifax Harbour.

The SS Mont Blanc is famous for its role in the Halifax Explosion, and historians are urging the province to preserve these pieces of history. Tom Murphy has the story.

Nova Scotia sends a tree to Boston each year as a thank you for the city's help when disaster struck more than 100 years ago. This year's tree is from Antigonish County. Brett Ruskin has the story.

Nova Scotia has been sending a tree to Boston for more than 100 years. This year's tree is from Antigonish County. Brett Ruskin has the story.