Gas-Gas-Gas Army Reserve Col. Dan Hershkowitz, commander, 90th Sustainment Brigade, signals “gas” to his soldiers during a simulated attack, part of Operation Lethal Warrior at Fort McCoy, Wis., Aug. 10, 2018. Army Reserve photo by Spc. John Russell SHARE: Download: Full Size (1.47 MB) Tags: Army Reserve, Northcom, Northern Command, Soldiers, Army Credit: Spc. John Russell VIRIN: 180810-A-DR075-014A.JPG Photo Gallery