Security researchers offer caution on smart grids

LAS VEGAS — The race to build a "smarter" electrical grid could have a dark side. Security experts are starting to show the dangers of equipping homes and businesses with new meters that enable two-way communication with utilities.

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As Web communication shrinks, so do links

NEW YORK — On the short-messaging service Twitter, space is at a premium: You've got 140 characters to make your point, and you probably don't want to waste half of it on a super-sized link to your latest YouTube obsession.

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