Dental Work Army Reservists and National Guardsmen dentists and dental assistants work alongside a U.S. Public Health Service personnel in Pharr, Texas during a free dental clinic as part of Operation Lone Star, an annual medical disaster preparedness exercise, July 27, 2016. SHARE: Download: Full Size (0.98 MB) Tags: Army Credit: Texas Army National Guard Sgt. 1st Class Malcolm McClendon VIRIN: 160727-Z-FP744-047C.JPG Photo Gallery