Ten years after nearly two dozen federal agencies were gathered together to create the Department of Homeland Security, the agency has yet to adequately define and implement a plan for dealing with cyberthreats against U.S. infrastructure, officials say. According to defense experts and former DHS officials testifying before a Senate panel on the anniversary of the 9/11 terrorist attacks, while the agency has responded to nearly 200,000 cyber incidents in the past year, it is no closer to a unified strategy for neutralizing the threat.

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