I'd ask the CFO to respond. But the first thing I would say is that the lapse in 2007-08 I believe was essentially an anomaly. I believe there was one other time in recent history when we actually lapsed anything, and that was a fairly small lapse. So we work as effectively as we can to essentially land a very large organization on a very small dot in financial terms. Two hundred million dollars, 1% of a $20 billion budget, is pretty tough. We can't go the other way, so we're not ever going to be in a position to move over our appropriation.
We manage in a risk-averse way in terms of the appropriation. If we have to go one way or the other, we clearly will end up lapsing money as opposed to moving into a world where we're above our appropriation.