Terrorism is the use of violence or the threat of violence to attain political, religious or ideological goals. Terrorists accomplish this through intimidation, coercion and instilling fear.

Oklahoma City bombing fence memorial
A memorial at the Oklahoma City bombing site.

Acts of terrorism include assassinations, bomb scares and bombings, cyber attacks (computer based), hijackings, kidnappings, and the use of chemical, biological, nuclear and radiological weapons.

Terrorists often choose targets in areas with relatively easy public access that offer little danger to themselves. Foreign terrorists look for visible targets where they can avoid detection before and after an attack, such as:

  • Government facilities (military and civilian)
  • International airports
  • Large cities
  • Major international events
  • Resorts
  • High-profile landmarks

Terrorists might also target large public gatherings, water and food supplies, utilities, and corporate centers. They are also capable of spreading fear by sending explosives or chemical and biological agents through the mail.

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Man with backpack stands out in crowd of blurred street imagery.
REPORT SUSPICIOUS BEHAVIOR

If You See Something, Say Something

You play an important role in protecting your community. Pay attention to your surroundings, learn how to recognize the signs of suspicious activity, and know when to report it to local law enforcement.

Preparing for a terrorist incident

Disaster History - HSEM Remembers 9/11

9/11 Terrorist Attack

2,753

lost at World Trade Center

184

lost on American Airlines Flight 77

40

lost on United Airlines Flight 93

78

countries with citizens lost

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Manhattan skyline with blue lights representing the missing World Trade Center buildings.
September 11, 2001

HSEM REMEMBERS 9/11

On the 20th anniversary of 9/11 in 2021, four members of the HSEM staff, now and then, spoke about how the tragic day shaped them, how it has affected them both personally and professionally, and reflected on the events 20 years later.