Hurricanes. Earthquakes. Floods. Blizzards. Frightening but all too familiar natural disasters. But what about a tsunami wave hitting the east coast of the United States? In this hour, we look at such an event that could be caused by a massive island landslide triggered by a volcano off the coast of Africa. We explore the awesome tsunami recorded by German colonists in New Guinea triggered by a volcanic explosion on Ritter Island in 1888. Leaping forward, we hear from leading scientists about the possibility of a potentially catastrophic collapse of the west-facing façade of a volcano located in the Canary Islands. Potentially 500 times the size of the collapse at Ritter Island, it could trigger a tsunami with initial waves over 900 meters high. A North American city on the eastern seaboard, such as Charleston, South Carolina, would have no more than nine hours to evacuate before waves as high as 40 feet inundated the city, leaving a huge wake of destruction and damage.