Airman 1st Class Ants Vahk and Airman Antione Van, both 92nd Aerospace Medicine Squadron bioenvironmental engineers, prepare air sampling pumps May 25, 2016 at the Grand Coulee Damn, Wash. shooting range. The air samples collected were of copper dust, fumes and lead during a heavy weapons firing. “We’ll do an air sampling, send the samples to the lab and then wait for the results to let us know if we need to take any further precautions,” Vahk said. (Courtesy Photo)