Stephen Trevor was a United States Army Air Service officer who worked for British Intelligence in World War I.  Steve was a spy, on a mission to find out about the toxic mustard gas that was being developed by Doctor Poison.  Captain Steve stole a notebook containing the gas formula and then he took off in a plane to escape from the Germans.  His plane was shot down and Steve was saved from drowning by the Amazon princess Diana.  Diana had never seen a man before, so she asked Steve if he was one.  The plane was destroyed in the crash, but the Amazons rebuilt it and added some of their own magic to it, by making it invisible.  It was capable of vertical takeoffs and landings and at Wonder Woman’s disposal whenever she decided to use it.  It was made invisible so it couldn’t be tracked when she decided to leave the secret island, thereby giving away its…