WASHINGTON (AP) — The Food and Drug Administration on Tuesday named a longtime regulator of cancer medicines to lead the agency's drug center, replacing the former drug director who was recently ousted after an ethics complaint. Dr. Richard Pazdur, a 26-year veteran of the agency, will become director of the Center for Drug Evaluation and Research, the FDA's largest unit. A cancer specialist, Pazdur has previously served in numerous FDA roles, most recently leading the agency's Oncology Center of Excellence.