Whatever “sixth generation” means relative to “fifth generation”, I would suggest to you that when we talk about those, we're talking 20 years down the road. The F-35 fifth-generation fighter is the only capability that exists out there, not only for Canada and the United States, but also for all our major allies.
It's going to proceed, but I would add for you that, in my view, this will be the last manned fighter that any of the nations buy. We will move in a different direction as drones and the technology related to them become more and more capable of replicating what fighters do.