Walls aren’t rocket science they’ve been building them since the dawn of time. I’m with him, enough of prototype this and prototype that. The SR 71 from conception to first flight was under 2 years.
We are talking about a freaking wall....a wall
Uh, no. The A-12 design was started in late 1957 and first flight was in 1962. The SR-71 (which is a variant of the A-12) didn’t fly until December 1964. That’s a bit more than two years total development time here, dude - I’ll take your retraction now.
https://en.m.wikipedia.org/wiki/Lockheed_A-12
https://en.m.wikipedia.org/wiki/Lockheed_SR-71_Blackbird