If you are referring to free trade agreement then its not functional. moreover freetrade agreement will save lots of cost for your own economy. there are many items which go to other countries before being sent to pakistan . obviously it will save cost for you . also few months back your own...
bro if I am correct then one need access to source code to integrate other weapons with planes. You mean to say engineers have capability to modify source code. USA will commit suicide and PAF can make billions if they sell F16 source codes.
They both are hungry for money and you fools are giving it to them . try to spend it on poor people or to develop industries. that will be more helpful for you.