Another thought....
It it takes 20 odd years to develop a modern combat aircraft these days, shouldn't Air Forces already be looking for replacements for all their aircraft currently in service, on the basis that almost as soon as you introduce a new type you need to start sourcing its successor? Or are 40+ year old combat aircraft going to become the norm in the future?
Last edited by Biggus; 19th Aug 2013 at 08:40.