Amid warnings that North Korea and Iran have plans to take out parts of the U.S. electric grid through a cyber attack or atmospheric nuclear blast, the Pentagon is taking steps to both protect the nation's communications and power lifeline.

The Defense Advanced Research Projects Agency has charged BAE Systems to map a system that can detect a cyber attack and gin up an alternative communications network for military and civilian use if the grid is fried, according to Defense Systems, the online newsletter.

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