Rudolph...

I was reading a book to Drew that Becky and the kids picked up from the library the other day.  Disclaimer...If I am just nuts, feel free to just tell me so...

Does Rudolph always lead Santa's sleigh?  The book I was reading showed the sleigh and reindeer, and there was no Rudolph. So it got me thinking.  If Rudolph doesn't always lead the sleigh, when does he?  Did he only lead once?   Does he only lead on certain years where the weather is especially foggy?  Well, foggy when they take off from the North Pole, what about the rest of the world. 

So, according to my analysis, I think the Rudolph story falls apart.  I don't think it is real.

Rob