Spc. Brittany Mattison of the Alabama National Guard&#039;s 690th Chemical Company crouches to apply indicator solution to the underside of a truck with a prototype applicator during Contamination Indicator Decontamination Assurance System &amp;#40;CIDAS&amp;#41; testing April 7, 2016 at Dugway Proving Ground, Utah. Involving end-users in testing is common, and often reveals valuable test insights. Photo by Al Vogel / Dugway Public Affairs.