Kenneth P. Rapuano, assistant secretary of defense for homeland defense and global security, left, and Marine Corps Lt. Gen. Joseph L. Osterman, deputy commander of U.S. Southern Command, testify on the Defense Department's role in countering weapons of mass destruction at a hearing of the Senate Armed Services Committee's emerging threats and capabilities subcommittee in Washington, D.C. Feb. 7, 2018. Screenshot via Defense.gov