The Cabinet-level Department of Homeland Security grew out of the biggest government reorganization since World War II. The department merged 22 diverse agencies into four divisions: Border and Transportation Security; Emergency Preparedness And Response; Chemical, Biological, Radiological, and Nuclear Countermeasures; and Information Analysis and Infrastructure Protection. It will eventually employ 170,000 workers with a combined budget of about $40 billion. Its secretary's primary mission is protecting the nation from terrorism. Considering the size and scope of the agency, critics say there are likely to be a few bumps along the way.
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