Congrats to your son, Basil.
To me, there's an extra sense of pride in family members who excel in the military. It's not exactly like success in the business world, but a deeper sense of pride borne of the tradition of sacrifice that's inherent in military service. The business world has no such parallel.
My nephew recently had a similar experience in the Air Force. A very fine feeling it is. I hope you can take time to fully enjoy it. I've experienced it too, and it's really special.
Cheers to you and your family!