When you build these things, they are naturally modular in terms of the products that go within them. There will be natural modules integrated together in a coherent whole as these things are built. It will also probably come out that we'll build these in batches, because given that it is occurring over such a long period of time, it's logical that you're going to have technology changes as the build cycle goes along.
On November 29th, 2016. See this statement in context.