Player Embed Code: Download Embed Share Senior Defense Officials Testify at House Armed Services Committee on Strategic Forces Defense.gov April 17, 2018 | 01:13:00 John C. Rood, undersecretary of defense for policy, Air Force Gen. Lori J. Robinson, commander of North American Aerospace Defense Command and U.S. Northern Command, Air Force Lt. Gen. Samuel A. Greaves, director for the Missile Defense Agency, and Army Lt. Gen. James H. Dickinson, commanding general for U.S. Army Space and Missile Defense Command and Army Forces Strategic Command, testify before a House Armed Services Committee on strategic forces, April 17, 2018.