When it comes to fears about a terrorist attack, people in the United States usually focus on Osama bin Laden and foreign-based radical groups. Yet researchers say domestic extremists who commit violence in the name of their cause - abortion or the environment, for example - account for most of the damage from such incidents in this country.
These home-grown groups are seven times more likely than overseas groups to commit some kind of violence in the United States, a panel reported yesterday in Boston at the annual meeting of the American Association for the Advancement of Science.
