 the U-2 spy plane or the SR-71 Blackbird or the stealth bomber or the B-2 bomber, something like that, before we knew what it was. Now, we all know what these things are. You can go visit them at museums. But imagine seeing that. I mean, these are the stories we heard from pilots in the 1950s and 60s. They're up 30,000, 35,000 feet going 600 miles an hour.