MoHAA secret level?
 

under console type in maplist then double click m410.bsp in the list. I certainly don't remember playing this level.... Lots of dogs :)

also read about a few other cool Easter Eggs over at http://www.planetmedalofhonor.com

Very cool stuff. I just played it.

I don't see why they left it out of the game. The scenery was excellent and the dogs were fun. My only complaint is that the dogs seemed to be smarter than my teamates.