Committee chairman Sen. Bob Corker (R-TN), U.S. Secretary of State Rex Tillerson, U.S. Secretary of Defense James Mattis, and ranking member Sen. Ben Cardin (D-MD) pose for a photo as they arrive for a Senate Foreign Relations Committee hearing concerning the authorizations for use of military force, October 30, 2017 in Washington, DC. As Mattis and Tillerson face questions about the administration's authority to use military force, Congress is still seeking more information about the deadly ambush that killed four U.S. troops in Niger.
{"Image ImageDescription": "WASHINGTON, DC - OCTOBER 30: Committee chairman Sen. Bob Corker (R-TN), U.S. Secretary of State Rex Tillerson, U.S. Secretary of Defense James Mattis, and ranking member Sen. Ben Cardin (D-MD) pose for a photo as they arrive for a Senate Foreign Relations Committee hearing concerning the authorizations for use of military force, October 30, 2017 in Washington, DC. As Mattis and Tillerson face questions about the administration's authority to use military force, Congress is still seeking more information about the deadly ambush that killed four U.S. troops in Niger. (Photo by Drew Angerer/Getty Images)", "Image Copyright": "2017 Getty Images"}