BLACKBURG, Va. (WDBJ) - It all started out as an idea. A mask to protect protestors from tear gas. “We started looking into current issues that were going on and at the time it was the protest ...

1 / 2 Show Caption + Hide Caption – Pfc. Daniel Markham checks his gas mask for an air tight seal as nuclear, biological, radiological and chemical training begins Jan. 20 here.