Before Chief Aviation Ordnanceman (AW/SW) Robert Williamson could embrace the sister he hadn’t seen in decades, he made sure to render a salute. Navy nurse Cmdr. Cindy Murray and her brother had spent most of their lives trying to find each other. After their parents divorced in the 1970s, 14-year-old Murray and her mother moved away from their Denver area home, while her 6-year-old brother stayed behind with his father. Murray, 51, finally decided to call up her father in July. She hadn’t spoken to him in decades. He dropped a bombshell: Her long-lost brother was also in the Navy. She…