When the RMS Lusitania set sail from New York for England in May 1915 the German government took out adverts in the American newspapers warning that travellers sailed at their own risk. The Lusitania's captain was confident the ship was too fast to be attacked, but it was hit by a torpedo from a German U- boat and sank in less than 20 minutes. More than thirteen hundred people were drowned, and the disaster was a key factor in rallying Americans to the Allied cause. Duncan Kennedy finds out why mystery still surrounds the sinking, and pieces together what happened on the Lusitania's last journey.
