Maj. Stewart Hamblen, deputy, Nuclear Disablement Team 3, explains to Maj. Gen. Thomas Vandal, director of Army Operations, Readiness and Mobilization, how a detector called the Sodium Iodide Gamma Ray Scintallator - or gamma detector, works and why NDTs use that particular model. The general visited the 20th Support Command Oct. 17 to learn more about the unit's chemical, biological, radiological, nuclear and high-yield explosives capabilities. "The capabilities you bring are unique for our Army and our nation," Vandal said as he addressed the group following the capabilities demonstration. "Your contributions can absolutely not be overstated," the Army current operations chief said.