Mattis Departure Defense Secretary Jim Mattis leaves Andrews Air Force Base, Md., for a trip to the Asia-Pacific -- his first official travel since becoming defense secretary -- Feb. 1, 2017. Mattis will begin his fourth trip April 18 with stops in the Middle East and Africa. DoD photo by Army Sgt. Amber I. Smith SHARE: Download: Full Size (1.08 MB) Tags: SecDef, JIM MATTIS Credit: Amber I. Smith VIRIN: 170201-D-SV709-0032.JPG Photo Gallery