I can tell you that before I joined the foundation I participated in a similar process, and I felt that disappointment very acutely. I think anybody who's participated in a request for proposals understands that disappointment is often the outcome, whether it's because you don't win or because the process doesn't go forward. I think any time you make a decision where people put an awful lot of effort into something and you have to go back to them and say, I'm sorry, it was all for naught...that's not a decision anybody takes lightly.
The problem is that you're charged with husbanding extraordinarily scarce resources. We have this extraordinarily large problem, and if we believe that reallocation of those resources to something that's more urgent should be done, then, inasmuch as you don't want to hurt the people who applied, the potential benefit associated with reallocating them is so much bigger that you have to make that tough choice. And believe me, it's harder to do that than just to follow the path you were on.