Thanks Fuzz
They were planning to move to my city, and have had their house for sale since May. I wasn't looking forward to it (because my dad and I don't get along all that well) but I was hoping that it would be an opportunity to find common ground and have some peace in his later years. I think all of that is on hold now...
I guess my grief is not so much about whether he dies, but for the relationship that may never be good. I've tried really hard with him, but we have dramatically different value systems and he isn't willing to budge much.
Anyway, thanks again