In a predawn raid on an apartment building in a neighborhood six miles southeast of Rome, Italian officials last week arrested four Moroccan men and found dozens of fake identification documents, charts of Rome's water system and a map of the city with the U.S. embassy circled in red.
Particularly chilling was the additional discovery of 9 lbs. of a cyanide-based chemical substance, which sparked fears that Rome's water system, which runs beneath the embassy, was the target of a terrorist attack. Upon further investigation, however, authorities learned that the chemical appeared to be potassium ferrocyanide, which is not lethal...