U.S. Army Staff Sgt. Michelle Lewis, an aviation life support equipment (ALSE) NCO technician assigned to the 1-135th Attack Reconnaissance Battalion, explains how to properly focus Night Vision Goggles (NVGs) when performing maintenance to members of the Panamanian Public Forces at Whiteman Air Force Base, Mo., March 16, 2016. During the visit, six representatives from the Public Forces participated in a subject matter exchange with the Missouri National Guard, covering topics including aviation life support and NVGs. (U.S. Air National Guard photo by Senior Master Sgt. Mary-Dale Amison)