Where must a court of appeals grant a certificate of appealability in a habeas corpus action where at least one judge votes in its favor?

QUESTIONS PRESENTED 1. Where multiple judges of a court of appeals consider an application for a certificate of appealability in a habeas corpus action, must the court grant the application where at least one judge votes in its favor, as the Third, Fourth, Sixth, Seventh, and Ninth Circuits prescribe, or may a divided court of appeals deny such an application, as the Eleventh Circuit did here and as is also permitted in the Second, Fifth, and Eighth Circuits? 2. Whether the rule of Brady v. Maryland, 373 U.S. 83, 87 (1963), contains a requirement that criminal defendants exercise reasonable diligence in attempting to obtain material, exculpatory information being withheld by the prosecution? i