The technology, the wind tunnels, the materials science. Much of it overlaps with military applications and the DoD works with NASA. The original NASA was mili

The technology, the wind tunnels, the materials science. Much of it overlaps with military applications and the DoD works with NASA. The original NASA was military only. Then an all civilian nasa was formed and the two quasi competed. There is a really good overview of this in Chuck Yaeger’s autobiography.