The Air Force is planning to expand its infrastructure to conduct operational tests of hypersonics technology, a next-generation capability the service has prioritized for rapid prototyping. Air Force Secretary Heather Wilson spoke about the advances yesterday during a House Armed Services Committee hearing, saying, "We are actually going to be building some more wind tunnels -- hypersonic wind tunnels. I just visited where we're going to be building one in Indiana and then another one at Arnold [Air Force Base,...