Abstract The urban population in Ethiopia is increasing rapidly.We read every letter, fax, or e-mail we receive, and we will convey your comments to CIA officials outside OPA as appropriate. The Office of Public Affairs (OPA) is the single point of contact for all inquiries about the Central Intelligence Agency (CIA).Choose from a wide variety of top quality on demand streaming video yoga classes, audio yoga classes and meditation classes, or download your classes and keep them forever. Online yoga classes from Yoga Download.