; (2) the term law enforcement agent means— (A) any Federal, State, local or tribal official authorized to enforce criminal law; and (B) when conveying a command described in subsection (b), an air traffic controller; (3) the term lawful command includes a command to stop, decrease speed, alter course, or land, whether communicated orally, visually, by means of lights or sirens, or by radio, telephone, or other communication; (4) the term motor vehicle means any motorized or self-propelled means of terrestrial transportation; and (5) the term serious bodily injury has the meaning given in section 2119(2) of this title. . (b) Construction The amendments made by subsection (a) shall not be construed to create eligibility for relief from removal under former section 212(c) of the Immigration and Nationality Act ( 8 U.S.C. 1182(c) ) if such eligibility did not exist before the date of enactment of this Act. 516. Prohibition onasylum and cancellation of removal for terrorists (a) Asylum Subparagraph (A) of section 208(b)(2) of the Immigration and Nationality Act ( 8 U.S.C. 1158(b)(2)(A) ), as amended by section 506 and 507, is further amended— (1) by inserting or the Secretary after if the Attorney General ; and (2) by striking clause (v), and inserting: (v) the alien is described in section 212(a)(3)(B)(i) or section 212(a)(3)(F), unless, in the case of an alien described in subclause (IX) of section 212(a)(3)(B)(i), the Secretary or the Attorney General determines, in his or her sole and unreviewable discretion, that there are not reasonable grounds for regarding the alien as a danger to the security of the United States; . (b) Cancellation of removal Paragraph (4) of section 240A(c) of the Immigration and Nationality Act ( 8 U.S.C. 1229b(c)(4) ) is amended— (1) by striking inadmissible under and inserting described in