Re: Why do we always re-engineer our aircraft??
Aside from issues of politics (jobs, workshare etc) it's about adaptability. We spend an awful lot of money on these bits of kit. However, the threat they were designed to deal with is ever changing. So, rather than go out and buy a anew ac specifically designed for mission x, why not adapt an existing ac to carry out mission x. It goes on all the time and, just like the human race, it's evolution.
sw