Sen. John S. McCain greets Defense Secretary James N. Mattis and Marine Corps Gen. Joe Dunford, chairman of the Joint Chiefs of Staff, before a Senate

Sen. John S. McCain greets Defense Secretary James N. Mattis and Marine Corps Gen. Joe Dunford, chairman of the Joint Chiefs of Staff, before a Senate Armed Services Committee hearing on Capitol Hill, Oct. 3, 2017. Mattis and Dunford testified about the political and security situation in Afghanistan.

Sen. John S. McCain greets Defense Secretary James N. Mattis and Marine Corps Gen. Joe Dunford, chairman of the Joint Chiefs of Staff, before a Senate Armed Services Committee hearing on Capitol Hill, Oct. 3, 2017. Mattis and Dunford testified about the political and security situation in Afghanistan.