Congratulations Teacheranon!
They are domestic terrorists, The Patriot Act could be used to charge them.
Section 802 of the USA PATRIOT Act (Pub. L. No. 107-52) expanded the definition of terrorism to cover ""domestic,"" as opposed to international, terrorism. A person engages in domestic terrorism if they do an act "dangerous to human life" that is a violation of the criminal laws of a state or the United States, if the act appears to be intended to: (i) intimidate or coerce a civilian population; (ii) INFLUENCE the POLICY of a GOVERNMENT by INTIMIDATION or COERCION; or (iii) to affect the conduct of a government by mass destruction, assassination or kidnapping.