With family, that's the main thing. That's why you do things. Being a bit older and seeing my kids grow into teenagers, I'm helping them grow up in life. That's what I'm proud of - that's what I do everything for.

One does have to point to the fact that we did achieve an agreement, that we had that agreement endorsed by a majority of the people of Northern Ireland; that despite very considerable political difficulties since then, we have actually managed to implement the greater part of the political agenda of that agreement, and we have restored local parliamentary institutions in Northern Ireland, that we have a local administration in place which is working, maybe not working ideally, but is still actually there. Those are the significant political developments that one’s had a hand in and obviously, one would point to that as being the things that one looks back at with most satisfaction, but I realize that it’s still work in progress.

If it’s one thing, obviously it had to have been being selected to make the first manned space flight for the United States. That was competition at its best, not because of the fame or the recognition that went with it, but because of the fact that America’s best test pilots went through this selection process, down to seven guys, and of those seven, I was the first one to go. That always will be the most satisfying thing for me.

And then in 1974 I started to work on phosphorous chemistry which is the area of which I’m most proud as it turns out. I’m most proud of my work on carbon phosphorous chemistry.