A question for the two seat chaps: Is there a need for a two seat F-35? Not thinking about the cost of developing a two seater at this stage there are several missions that have been the domain of the two seater. Long range interception, Fast FAC, SEAD and numerous others. Add to the mix conversion training would be simplified (that seams less of a bother these days) so is there a need for a TF-35? (F-35D?)