I n a field outside of Kyiv last weekend , a van was parked discreetly behind some trees. Inside the van there were no passenger seats, just a long desk, two office chairs, two laptops, extra screens. Outside appearances to the contrary, this was a mobile drone-interceptor base, one of hundreds of similar vehicles now scattered around Ukraine. It’s also part of something much bigger: a set of technological advances that have changed the war with Russia, and maybe all wars, forever. On one of