Dan Rather's Behavior explained!

I have discovered the reason that Dan Rather has continued to defend the National Guard memos, against all evidence of forgery. He is planning to leave his day job and go on the road as a straight man for Bagdhad Bob, funded by an Al-Jazeera - Michael Moore joint venture.
I know this is true because I received a fax of a copy of a fax of a memo by a man long dead that says it is.