Does the not-knowing make you nervous when you turn up for work?
Personally no. I don't want to sound as if I'm callous or unsympathetic for the plight of the relatives, that's not the case and I'd like to know what happened but no two flights/accidents are the same and my job is to prevent another one from happening, not worrying about one I have no influence over.
I am curious as to how you deal with this on a daily basis
TBH it's report for work as normal, get airborne, probably spend some of the time in the cruise talking about the accident and having a special chuckle about some of the theories in this place.....pretty much a routine day at the office.