Section 212(a)(3)(B)is a provision of law that was included in the US Patriot Act and provides:
(3) Security and related grounds. -
(B) Terrorist activities-
(i) In general. - Any alien who -
(I) has engaged in a terrorist activity,
(II) a consular officer or the Attorney General knows, or has reasonable ground to believe, is engaged in or is likely to engage after entry in any terrorist activity (as defined in clause (iv),
(III) has, under circumstances indicating an intention to cause death or serious bodily harm, incited terrorist activity,