In terms of the bill, I'm not sure we really know the answer to that. I think the way the program is set up is that, because there's a large membership, all the different members will basically pay a percentage based on the size of their fleet, but I'm not really sure what the denominator is in that equation.
There's a pace of rapid rollouts of new block upgrades and new enhancements to the software that runs the aircraft and the avionics. My understanding is that this is basically designed to keep moving in perpetuity so that the aircraft is continually upgraded.
While we don't know the specific cost, I think one thing we do benefit from is that we are a relatively small chunk of a very big fleet, including the bulk of the American Air Force's R and D investment in tactical fighters.