Dr. Mark N. Ozer is a former professor of neurology at Georgetown University Medical School, and he currently holds the position of lecturer for the Osher Lifelong Learning Institute at American University. Dr. Ozer has self-published several books on the history of Washington, D.C. He remains active in the capital's history community as a member of the U.S. Capitol Historical Society; the Historical Society of Washington, D.C.; the Organization of Oldest Inhabitants (of D.C.); the National Association of Olmsted Parks; and the McLean Gardens Community Association.