Thank you, Mr. Chair.
I will ask Mr. Slack to also comment. As the project manager, he's been involved in the program for 13 years, right from the beginning.
Now, right from the beginning, when we initially signed that first MOU, as I said in my opening remarks, we put full-time people into the joint program office in Washington. Even in the most early days, the only real participants in that were the Americans, the British, and Canada.
Right from the beginning, the joint project office was keenly interested in understanding what the needs of the partners were in terms of lethality, survivability, and affordability, without which those partners would not have proceeded to continue in the program and actually acquire aircraft. It had to respond to the needs of all of the partners. That's one of the reasons you see three variants today: conventional takeoff and landing, which we're buying; carrier variant, which the British and the Americans are buying; and a short takeoff and landing variant, which, again, the British and the Americans are buying. We had direct input into the operational requirements document that drove the competition between Boeing and Lockheed Martin.