Pentagon Ceremony Deputy Defense Secretary Pat Shanahan, right, raises his right hand during a swearing-in ceremony with Defense Secretary Jim Mattis at the Pentagon, Aug. 14, 2017. The Senate confirmed Shanahan July 18 and he officially took office the next day. DoD photo by Army Sgt. Amber I. Smith SHARE IMAGE: Download Image: Full Size (1.13 MB) Tags: JIm Mattis, pat shanahan, SecDef, DepSecDef Photo By: Amber I. Smith VIRIN: 170814-D-SV709-079E.JPG Photo Gallery