Thank you, Mr. Chairman.
Let me add my voice of welcome to you, gentlemen. I know I speak for my colleagues who are appreciative of the fact that you're giving time and energy to meet with us this afternoon to share your expertise with us.
My question is this. With advanced technology designed into the F135 or F136 engines, is having a second engine as important as it used to be? I'm not sure about aircraft engines, but I kind of look at V8 engines, which used to be predominantly found in cars, and now V6s are the predominant engine. Could you maybe share with us the difference?