Titanic's Tragic Twin: The Britannic Disaster

It's one of Britain's greatest untold disaster stories. In the wake of the Titanic disaster, her sister ship Britannic was re-engineered to be even stronger and safer.

And yet she suffered the same fate in 1916, sinking in just 55 minutes, three times faster than Titanic. This fascinating history documentary looks at what happened to the Britannic and if the tragedy could have been avoided.