Agency's decision that petitioner had not established state of citizenship was supported by substantial evidence, given the small amount produced after continuance, and lack of explanation for the limited amount of proof.
IJ did not have to make a formal adverse credibility finding to justify rejection of the petitioner's claim as to country of citizenship and requirement of additional evidence.
Under firm resettlement principle, claim against deportation is heard based on the country from which the petitioner came to the US, and from which he held a valid passport, which, since logically possible, creates an inference of sufficient opportunity for permanent residence.