Lt. Doug Schukman, assigned to Expeditionary Medical Facility Great Lakes, prepares for surgery on a Multiple Amputation Trauma Trainer during the Collective Protection Exercise held on Naval Weapons Station Yorktown-Cheatham Annex. The Collective Protection Exercise displayed the collectively protected environment, which provides a collective protection to the warfighters and their equipment in support of military missions and operations as a seamless, integrated sub-system to all manners of platform, which utilize state-of-the-art chemical, biological and radiological protective technologies. (U.S. Navy photo by Mass Communication Specialist Scott Barnes/Released)