The President of the United States of America takes pleasure in presenting the Navy and Marine Corps Medal to Lieutenant Commander William Glenn Arnold, United States Navy, for heroism while serving at Helicopter Mine Countermeasures Squadron FIFTEEN on 13 May 1984. Upon observing a severely injured man who had been thrown overboard from a motorboat on the Virginia inter-coastal waterway, and with the unattended boat circling at high speed to within five yards of the victim, Lieutenant Commander Arnold with complete disregard for his own safety and fully aware of the personal dangers involved dove into the water in an effort to assist the submerged man. Upon reaching him, Lieutenant Commander Arnold was able to keep him above surface until help arrived. By his courageous and prompt actions in the face of great personal risk, Lieutenant Commander Arnold undoubtedly saved the man from drowning; thereby reflecting great credit upon himself and upholding the highest traditions of the United States Naval Service.