Our guest is Judge David Tatel, who recently took senior status on the U.S. court of appeals for the DC circuit after joining the court in 1994. He was appointed to fill the seat created by the appointment of Justice Ruth Bader Ginsburg to the Supreme Court. Judge Tatel speaks with Dr. Sharfstein about West Virginia v. EPA, in which the Supreme Court announced a major new doctrine for judging actions by health agencies to protect the public.