The forgotten B24 squadron of the famous Flying Tigers consisted of but five planes. Their Japanese target on Mission 19 was one that mystified the crews. Why didn’t they receive the usual fighter cover? And why, after more than a half century, are there World War II historians who insist there were no B24s attached to the Flying Tigers in China? Letters from the past shed new light on the mystery and controversy that still surrounds this tragic and little known mission.