(There always seems to be someone that believes Juan Rico was from Buenos Aires. I can only assume that comes from the movie. In fact Rico was Filipino which is revealed near the end of the book when he says his native language is Tagalog. The following passage from the book states unequivocally that Rico is not from Buenos Aires!)

I suppose I noticed the destruction of B.A. much less than most civilians did. We were already a couple of parsecs away under Cherenkov drive and the news didn’t reach us until we got it from another ship after we came out of drive.

I remember thinking, “Gosh, that’s terrible!” and feeling sorry for the one Porteño in the ship. But B.A. wasn’t my home and Terra was a long way off and I was very busy, as the attack on Klendathu, the Bugs’ home planet, was mounted immediately after that and we spent the time to rendezvous strapped in our bunks, doped and unconscious, with the internal-gravity field of the Valley Forge off, to save power and give greater speed.

The loss of Buenos Aires did mean a great deal to me; it changed my life enormously, but this I did not know until many months later…

…I guess that was the worst time in all my life. I was already in bad shape for a personal reason: My mother had been in Buenos Aires when the Bugs smeared it.

I found out about it one time when we put in at Sanctuary for more capsules and some mail caught up with us—a note from my Aunt Eleanora, one that had not been coded and sent fast because she had failed to mark for that; the letter itself came. It was about three bitter lines. Somehow she seemed to blame me for my mother’s death.

Whether it was my fault because I was in the Armed Services and should have therefore prevented the raid, or whether she felt that my mother had made a trip to Buenos Aires because I wasn’t home where I should have been, was not quite clear; she managed to imply both in the same sentence…

Starship Troopers— Robert A. Heinlein