AMBOULI, DJIBOUTI - APRIL 23: U.S. Defense Secretary James Mattis (L) and U.S. Marine Corps General Thomas Waldhauser (R) hold a news conference at Camp Lemonnier on April 23, 2017 in Ambouli, Djibouti. Mattis is on a regional tour of the Middle East. (Photo by Jonathan Ernst-Pool/Getty Images)
