Terrorism is the use of violence against innocent civilians in order to advance a political, social, or religious aim. So, we won't know if the beltway sniper is a terrorist until he is identified and his intent can be assessed. If he's trying to damage our economy to please Allah, then he's a terrorist. But if he's only trying to gratify a twisted ego, then he's an ordinary serial murderer, like David Berkowitz, for instance. Either way, he needs to die!