U.S. Soldiers with the 202nd Explosive Ordnance Disposal Company, 201st Regional Support Group, Georgia Army National Guard finish wrapping a device suspected of leaking a chemical agent as part of evidence collection during exercise Ravens Challenge VIII at Redstone Arsenal, Ala., June 29, 2014. Ravens Challenge VIII is a national-level interoperability exercise with multiple state and federal agencies, hosted by the Bureau of Alcohol, Tobacco and Firearms.