Under INA 212(a)(3)(B)(ii) –
Any activity which is unlawful under the laws of the place where it is committed (or which, if committed in the U.S., would be unlawful under the laws of the U.S. or any State) and which involves any of the following:
(I) The highjacking or sabotage of any conveyance (including an aircraft, vessel, or vehicle).
(II) The seizing or detaining, and threatening to kill, injure, or continue to detain, another individual in order to compel a third person (including a governmental organization) to do or abstain from doing any act as an explicit or implicit condition for the release of the individual seized or detained.
(III) A violent attack upon an internationally protected person (as defined in 18 USC 1116(b)(4) [see below]) 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 explosive or(VI) A threat, attempt, or conspiracy to do any of the foregoing.
(b) firearm (other than for mere personal monetary gain), with intent to endanger, directly or indirectly, the safety of one or more individuals or to cause substantial damage to property.