They would figure it out if they had to. The technology is not lost and for all the hate it garners the military industrial complex keeps the seeds of industry alive in the US. They would grow if there was an economic demand niche to grow into. Nobody has the stones to make it happen, though.

The labor & environmental arbitrage mafia won the war, so fixing the problem is going to be an uphill battle, rather than merely preventing the market from rolling downhill.