Colorado Army National Guard Spc. Ryan Zipp, 2nd Battalion, 135th General Support Aviation, puts on his personal protective equipment to prepare for a refuel of a UH-60 Black Hawk at Chatfield State Park in Littleton, Colo., April 11, 2015. Army aviation conducted water drops with Bambi Buckets working in conjunction with civilian firefighters. This training better prepares both entities for possible real-world scenarios. (U.S. Army National Guard photo by Spc. Ray R. Casares/Released)