On September 11, 2001, the nature of threats to public safety changed. The country came to realize that there was a much greater probability that weapons of mass destruction (WMD) could and would be used in an attack. This in turn created a new reality of personal protection for the law enforcement community, which became more difficult and complex. State, local, and regional law enforcement teams now are expected to play principal roles in the domestic war against terrorism and potential terrorism response missions.