Player Embed Code: Download Embed Share Southcom, Northcom Leaders Testify on National Security Challenges, Part 1 Defense.gov May 1, 2019 | 01:13:34 Navy Adm. Craig S. Faller, U.S. Southern Command commander; Air Force Gen. Terrance J. O’Shaughnessy, U.S. Northern Command commander; Kathryn Wheelbarger, acting assistant defense secretary for international security affairs; and Kenneth P. Rapuano, assistant defense secretary for homeland defense and global security, testify on national security challenges and U.S. military activity in North and South America at a hearing of the House Armed Services Committee in Washington, May 1, 2019.Part 1 of 2.