I'll say a few words and then I'll turn to Pat.
All of these contracts predated how we are approaching it now. We locked in kind of a fixed level of support, then you pay the increment. A lot of that would have been to make sure that we have more than enough support so that, if we end up using the plane—you can't predict crises in the world, you can't predict where your planes need to fly—we have it well covered.
As Pat indicated earlier, the new kind of contract we're trying to sign for that has tiered pricing so we're not locked in. When we have either.... We're finished in Afghanistan, then we no longer use the plane as much, or we have budget cuts that were put in place.... We had $2 billion in budget cuts to deal with. You can adjust your contracts going forward. That's what we've talked about in terms of the new kind of contract we're trying to sign.
Pat, do you want to add anything?