On September 11, Americans discovered that a civilian airline jet could be turned into a flying bomb. Now, the respected Economist magazine is warning that container ships could be the next terrorist vehicle. Each year, more than 7,500 commercial vessels make approximately 51,000 port calls, off-loading six million loaded marine containers in U.S. ports. Current growth predictions indicate the container cargo will quadruple in the next 20 years. One serious worry is that terrorists might use one of these ships to transport and then explode nuke in a major U.S. port -- perhaps crippling the U.S. economy as the nation's...