 His service number is #989548301.During his early naval career, Harm was a naval aviator flying F-14 Tomcats.On April 16, 1989, while flying an F-14 Tomcat to enforce a no-fly zone in the Gulf of Sidra, after he and his wingman were attacked, Harm shot down a Libyan Air Force MiG-23, disabled another, and forced the third one to return back to its base.