Player Embed Code: Download Embed Share Officials Testify at Hearing On Arctic Readiness Defense.gov March 3, 2020 | 01:16:29 Dr. James H. Anderson, performing the duties of deputy under secretary of defense for policy, and Air Force General Terrence J. O’Shaughnessy, commander, United States Northern Command and North American Aerospace Defense Command, give testimony on U.S. policy and posture in support of arctic readiness at a Senate Armed Services Committee hearing, March 3, 2020.