Laura,Mike's reply was brilliant and i am sure you took great comfort knowing that he and many others will be here if you ever need anything,i know i did.
Just one little word of caution laura.the surgery your Dad will require is hard for young previously tough and healthy men,so for a man of his age it is going to be monumental.His recovery may not be as straightforward or as quick as you may hope,so dont expect too much,too soon.
I am sure you will get through it,but i expect a few more tears will be shed.

Good luck for the 25th

love liz