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A planned fivefold increase in the staff of the U.S. Cyber Command is indicative of how conflict is moving toward center stage for the military, a domain similar to land, sea, air and outer space. The anticipated growth, described in an article by Ellen Nakashima in The Post last week, is intended to protect the country and its private sector from attack, an urgent mission. But now that the United States is going beyond defense, expanding forces for offensive attack, there’s a crying need for more openness. So far, forces exist almost entirely in the shadows.