WASHINGTON, June 28 -- The U.S. Department of Defense issued the following news: By Katie Lange Navy Lt. Michael P. Murphy was an avid defender of others -- a trait that likely led him to join the Navy and become one of the service's elite SEALs. In Afghanistan, he gave his life to save his team members from an overwhelming force. That sacrifice made him the first sailor since Vietnam to earn the Medal of Honor, and it inspired a Memorial Day challenge that's really caught on. Murphy was born more PR