Sad news for fans of the classic 'Ghostbusters' movie today.  Harold Ramis was responsible for directing movies like "Groundhog Day," "National Lampoon's Vacation," "Caddyshack," and "Animal House."  He wrote and appeared in 1984's "Ghostbusters" and wrote & directed 1999's "Analyze This" (and later 2002's follow-up "Analyze That"). 

Yahoo has the complete story and the orignal "Ghostbusters" theatrical trailer, here.