I got a phone call yesterday afternoon with this news, my heart missed a beat or too, Glen and Francis have been wonderful "friends" over the years.
For those not aware and wishing to send condolences, remember that Michael Ammar is married to Francis's daughter (Glen's by proxy), which might be the easiest route to the family in that there isn't much of a direct line at the public level.
Two major players within a week... I shudder to think who #3 is going to be... they always die in threes, after all.