What is the current state of the law on corroboration under the BIA?

We have explained that an asylum applicant's burden of proof can be met where the applicant provides "consistent, detailed, and credible testimony," unless corroboration is required by the agency. Diallo v. INS, 232 F.3d 279, 285 (2d Cir. 2000). We further elaborated that, before denying a claim solely because of an applicant's failure to provide corroborating evidence, the agency must "explain specifically, either in its decision or otherwise in the record: (1) why it is reasonable under the BIA's standards to expect such corroboration; and (2) why [the applicant's] proffered explanations for the lack of such corroboration are insufficient." Id. at 290.