On November 26, 1983, six armed men enter the Brinks-Mat warehouse in London near Heathrow airport. After failing to gain entry to the safes, they thought they were going to turn away empty handed, but that's when they saw a stack of grey boxes sitting on a pallet in the middle of the vault. They had no idea that these boxes held over 3 tons of gold, more than had ever been stolen in the history of the United Kingdom.