The image of peaceful environmentalists tree-sitting or sign-waving is a romantic one. But it's a completely false notion in the case of the radical Earth Liberation Front, or ELF. According to the FBI, ELF the nation's largest domestic terrorist group along with sister organization, the Animal Liberation Front, have been responsible for more than $43 million in damage to scientists, universities, farmers, developers, government agencies and businesses in recent years. Last week's arson attacks in a new community in suburban Maryland, south of Washington, DC have reminded us of the dangers of eco-terrorists. The arson attacks destroyed a dozen half-million...