Vehicle Vapor An autonomously activated device emits vapor to obscure the rear of a utility task vehicle at Yakima Training Center, Wash., April 26, 2019, during the Robotic Complex Breach Concept. Marines assigned to the 2nd Combat Engineer Battalion tested autonomous technologies during the event. SHARE IMAGE: Download Image: Full Size (1.65 MB) Tags: Marine Corps, Technology Photo By: Marine Corps Lance Cpl. Nathaniel Hamilton VIRIN: 190426-M-PH977-1177E.JPG Photo Gallery