In general terms, I would say that the Five Eyes relationship is of essential importance on the intelligence front. We gain far more than we give out of that relationship just partly by its nature, partly because of the capabilities of our partners. It is fundamental to our success and our ability to operate globally, that close, really unprecedented co-operation among five different countries.
Without talking about a specific capability area like submarines or anything else, the ability to speak the same specialized language around working in a domain and understanding the ins and outs of it and being able to talk to your counterparts who also have experience operating in that domain are an important part of information sharing. It's important to have people who, on all sides of that discussion, actually understand the business when you get into specialized capability areas.
Having said that, our allies have always been very open and generous with us. It's not to say they will always be so, but certainly historically we have benefited immensely with their willingness to share things with us across the spectrum of their own capabilities, whether or not we actually operate in those areas.