Opsec,
The cause of Colony Collapse Disorder still is not known. I suspect it will turn out to be a combination of factors. There now is significant money going into research on that. Much of the money is coming from bee breeders, large commercial beekeeping operations, large orchardists, and the hive registration fee beekeepers pay each April (in Washington). If you want to get a close look at a colony without stings, the Pacific Science Center has an observation hive (glass walls). I checked on it last week and it's healthy so far.
Liberty404