Protecting the American people from terrorist threats is the
reason the Department of Homeland Security was created, and
remains our highest priority. We protect the nation’s health
security by providing early detection and early warning of
bioterrorist attacks. Some chemical facilities possess materials
that could be stolen and used to make weapons. A successful
attack on certain high-risk facilities could cause a significant
number of deaths and injuries. The threat posed by violent
extremism is neither constrained by international borders nor
limited to any single ideology. - Critical infrastructure is the
physical and cyber systems and assets so vital to the United
States that their incapacity or destruction would have a
debilitating impact on our physical or economic security or
public health or safety. DHS works to enhance the nation’s
counter-IED capabilities and reduce the threat of explosive
attack against critical infrastructure, the private sector, and
federal, state, local, tribal, and territorial