Defense Department freaks out Twitter with cryptic tweet, 'Stranger Things' reference

The defense department’s technology wing asked the Twitterverse for help in finding privately owned underground space for testing purposes — and then made a “Stranger Things” joke amid a flurry of replies from freaked out users. DARPA, theDefense Advanced Research Projects Agency, touched off the madness with a cryptic tweet Wednesday morning. “Attention, city dwellers!...