As fascinating as drone warfare can be — particularly the seemingly sci-fi drone-vs-drone variety — keeping up with all the developments is a fool's errand. Yesterday's hot new thing is practically outdated today, and today's hot new thing may look obsolete tomorrow. That's an exaggeration, of course, but some days it doesn't seem like much of one. That's why today's news about Ukraine's Sting counter-drone caught my eye, and what it might mean for U.S. and other Western forces going forward. I vaguely remembered reading something about the Sting a year or more ago, but I just learned today that...