Senior Enlisted Advisor Army Command Sgt. Maj. John Wayne Troxell, senior enlisted advisor to the chairman of the Joint Chiefs of Staff, speaks with a Defense Department K-9 handler at the Pharr, Texas, port of entry, Aug. 14, 2018. DoD dogs along the U.S.-Mexico border are trained to alert on hidden drugs that cartels attempt to sneak across the Southwest border into the United States. DoD photo by Army Master Sgt. Rob Couture SHARE IMAGE: Download Image: Full Size (2.33 MB) Tags: Army Command Sgt. Maj. John W. Troxell, SEAC Photo By: Master Sgt. Rob Couture VIRIN: 180814-D-CQ958-001.JPG Photo Gallery