k upon an internationally protected person (as defined in section 1116(b)(4) of title 18, United States Code) or upon the liberty of such a person. (IV) An assassination. (V) The use of any- (a) biological agent, chemical agent, or nuclear weapon or device, or (b) explosive, 4/ firearm, or other weapon or dangerous device (other than for mere personal monetary gain), with intent to endanger, direc