I should have been slightly more precise, the advice was specifically about taking an internship in aerospace as a kid. I don't have any advice about having a career in aerospace industry... Haven't had one. I only had a short internship as a high school student at aero/space R&D company back in Russia. But that [aero/space R&D, not Russia ;)], I can highly recommend.

I think actually, a more general advice is to take an internship in any high tech industry area in which a cost of software or design failures is very, very high.