Thank you very much for the question. There really isn't a close competitor to fifth-generation. All of the other options that were considered were fourth-generation aircraft. Some of them had some improvements to them, so some of the marketing describes them as four-plus generation—4.5 or in that range—but there was no other option that was truly a fifth-generation and had the attributes that I described earlier of the very low observable stealth, advanced sensors, the fusion, and the networking.
On September 15th, 2010. See this statement in context.