Yes. There was a Faraday Cage built enclosing a room where cryptologic communications were sent and received. (Army Security Agency) No. The only thing I did on my own car for a few months in the 80s was change oil and filter. And yes. I turn off my cell phone EVERY night before I turn in, and fire it up again before breakfast to participate in the Prayer Thread every day here on FR, as part of my morning devotions. And I have great memories of the nearly 3 years I spent in Nippon. The Japanese, after their defeat and being given a representative form of gubmint are great people.
Indeed, the Japanese are such good people. Perhaps it is related to their continued veneration of family? I think so. The South Koreans are similar in goodness.