Ten years ago, building a defence tech startup got you called "stupid or evil." @Picogrid Co-Founder and CEO @zanemountcastle on defence being cool again: "Back when I first started working with the military, I was living in San Francisco at the time, and it was very against the grain...people looked at you like you were stupid, or evil, or both." "There's a lot of credit that, at least in the US, we owe to some people at the Pentagon in the mid-2010s." "[They] were doing very unsexy…