Geologists believe that Europe and Africa were separated by the Strait of Gibraltar about 5 million years ago. Now Spain and Morocco are making plans for an underwater rail connection, like the "chunnel" under the English Channel that connects Britain and France. What about terrorism and illegal immigration? Giles Tremlett, author of Ghosts of Spain and reporter for Britain's Guardian newspaper, has more on the engineering project of historic ambition.
KCRW
