Commentary: Islamist 5th-column Trojan horses - (United Press International): "The general commanding four loyalist columns moving on Madrid during Spain's civil war (1936-1939) referred to his militant supporters within the capital as his 'fifth column.' Nazi Germany and the Soviet Union maintained fifth columns in the United States. These were groups of secret sympathizers, sleeper cells, or supporters of an enemy who engage in espionage or sabotage, or simply disinform about the attacker's intentions. But as soon anyone suggests the presence of an Islamist equivalent in Western democracies, watch out."