MEMORANDUM **

Essa Samasa, a native and citizen of Sierra Leone, petitions for review of the Board of Immigration Appeals’ (“BIA”) order dismissing his appeal from an immigration judge’s decision denying his application for asylum, withholding of removal, and protection under the Convention Against Torture (“CAT”). We have juris *643 diction under 8 U.S.C. § 1252. We review for substantial evidence findings of fact, including adverse credibility determinations. So we v. Mukasey, 538 F.3d 1281, 1285 (9th Cir. 2008). We deny the petition for review.

Substantial evidence supports the agency’s finding that, even if credible, and even if Samasa established past persecution on account of a protected ground, the DHS had rebutted the presumption of a well-founded fear of future persecution based on changed country conditions in Sierra Leone. See id. at 1286.

Additionally, the BIA did not abuse its discretion in denying humanitarian asylum where Samasa failed to show sufficiently severe past persecution or a reasonable possibility of other serious harm upon removal to Sierra Leone. See 8 C.F.R. § 1208.13(b)(1 )(iii); see also Belayneh v. INS, 213 F.3d 488, 491 (9th Cir. 2000). Therefore, Samasa’s asylum claims fails.

Because Samasa failed to establish eligibility for asylum, he necessarily fails to meet the more stringent standard for withholding of removal. See Zehatye v. Gonzales, 453 F.3d 1182, 1190 (9th Cir. 2006).

Lastly, Samasa has not raised any arguments challenging the agency’s denial of CAT relief. See Martinez-Serrano v. INS, 94 F.3d 1256, 1259-60 (9th Cir. 1996) (issues not supported by argument are deemed abandoned).

PETITION FOR REVIEW DENIED.