[Ruth McCambridge]

Ronald, can you say more about this model? Why do you divide it that way and what makes that sorting useful? To me, the issue is very often fungibility and margin of any particular source but a lot of us have done that with a fairly broad brush or not at all to our detriment. It still floors me when I see an organization take on too many contracts that do not pay full cost (which should include various capital needs of the organization obviously.