Thank you.
Effectively, in that early options analysis piece, before you go to government for approval in principle to begin a project, we ask, in this case the air force, to identify their high-level mandatory requirements, what they really need that particular platform to be able to do. We take that and we look out at the market, with our colleagues in Public Works, and identify reasonable solutions, and have preliminary estimates of cost, performance, availability, etc.
In this case, that examination came back with a view that in terms of technology, looking forward 30 years, there was only one solution.