Just very quickly, if we were to follow your example and go outside of the memorandum of understanding--that is, demand IRBs--we would in fact bear the risk of paying more for the aircraft. It's because we're part of that international global supply chain that it allows us to get a preferred price and in fact benefit from future sales that could see the cost per aircraft come down.
So we would no longer be inside that club. We would no longer be part of that large international consortium. Demanding IRBs would actually force the price of the aircraft to go up, not come down.