Player Embed Code: Download Embed Share Defense Officials Brief Press on Niger Investigation Results Defense.gov May 10, 2018 | 01:04:12 Robert S. Karem, assistant secretary of defense for international security affairs; Marine Corps Gen. Thomas D. Waldhauser, commander of U.S. Africa Command; and Army Maj. Gen. Roger L. Cloutier Jr., chief of staff for U.S. Africa Command and lead investigating officer of the Oct. 4, 2017, ambush in Niger, brief reporters at the Pentagon, May 10, 2018.