Diane Otto Watkins Diane Otto Watkins takes a break from her M16 rifle range training in Mainz, Germany, sometime in 1984. Watkins retired as a chief warrant officer four in 1994 after 21 years of Army service. SHARE: Download: Full Size (0.38 MB) Credit: Courtesy photo VIRIN: 210517-D-D0439-008.JPG Photo Gallery