DARPA technologies

https://www.youtube.com/watch?v=vICFah-aDFY

I am sure this is all a few years old, but there were couple new things I hadn't seen before.

interesting hand warmer/cooler technology at 33:00, at 25:35 super efficient swimming contraption. At 22:35 a HTV 3X mach 7 plane that I assume is already flying somewhere. SR72?

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DARPA technologies