Startling Armageddon discovery

From the The London Telegraph:

Prisoners helped discover one of Christianity's earliest churches when they took part in an archaeological dig inside one of Israel's top security jails. A large and superbly preserved mosaic with a Greek inscription referring to the "Lord Jesus Christ" and featuring two images of a fish - an early Christian symbol - was discovered during renovation work inside the prison at Megiddo, thought to be the modern name for the biblical site of Armageddon.