It began with military needs and opportunities and it has gone on to change the very texture of our lives. Just think: “Smart Phone!” How everything on earth came to be viewable from space (whether your vehicle’s position or a moving ISIS squad about to be “droned”) is due to the pervasive new technology, still expanding, of Global Positioning Systems. We speak with Richard Easton, author of a fine new book, GPS Declassified, about the history of GPS technology. He is also the son of the man, Roger Easton, who gets the deserved lion’s share  of the credit for inventing GPS.