The destroyed sections of the Pentagon after the 9/11 attacks

Terrorism

Terrorism continues to evolve. Threats may come from abroad or be homegrown. Terrorists use tactics such as biological agents, weapons, explosives, and cyber attacks. Terrorists often use threats to create fear, convince people their government is powerless to prevent terrorism, and get immediate publicity for their causes. While you can be prepared in case of a terrorism event, these situations are often unpredictable and evolve quickly.

The destroyed sections of the Pentagon after the 9/11 attacks
Petri dish full of a disease
an explosion in a field
Person sitting in front of computer with padlock on screen