Tightened security for the Boston Marathon, to be run April 21, includes more police and a bigger list of searchable items, officials said Monday. Last year, two homemade bombs exploded near the finish line, with devastating impact.
Even primitive humans left data trails in the form of footsteps, campfires, and arrowheads. But in the digital age, we are constantly generating data. Search engines and advertisers tap it. So does the National Security Agency. Convenience and security are the upside. Loss of privacy is the downside.