Dung Phan v. Holder, 667 F.3d 448 (4th Cir. Feb. 1, 2012) (District of Columbia conviction of distribution of cocaine constituted a conviction of a drug trafficking aggravated felony, under INA 101(a)(43)(B), 8 U.S.C. 1101(a)(43)(B), for purposes of triggering a permanent statutory bar to showing good moral character, for purposes of naturalization, since the courts order setting aside the conviction, under the District of Columbia Youth Rehabilitation Act, D.C.Code 24"906(e), was done for rehabilitative goals, which do not bar the use of the conviction in the immigration context).