I think it's great that these were rescued back in their day. It's also pretty funny because technically, assuming Canadian laws are roughly the same as US laws, the engineer exfiltrated classified material from a secure location illegally. Which could partially explain why his kids were never allowed near them, for fear they may accidentally rat him out when they were young and wouldn't know better. Which makes it all the more risky.
I doubt it was that, so much as simply being "Dad's stuff." I don't really want my kids in my home office going through my papers either, and I am not hiding anything secret in here.
