Which agency is designated as the lead during a terrorist attack?

The Federal Bureau of Investigation (FBI) is designated as the lead agency during a terrorist attack because it has the primary responsibility for investigating and responding to terrorist incidents within the United States. The FBI is equipped with specialized resources and expertise in counterterrorism operations, which allows it to manage the complexities associated with such threats effectively.

In situations involving terrorism, the FBI coordinates with local, state, and federal agencies, ensuring that all necessary resources and information are shared to mitigate the threat. Their role includes gathering intelligence, conducting investigations, and managing evidence. The FBI works closely with other agencies, such as the Department of Homeland Security, but it is ultimately the FBI that takes the lead in coordinating the response and investigation during active terrorist events.

In contrast, while the Department of Homeland Security plays a significant role in overall national security and preparedness, and local police departments handle initial responses, the FBI's authority and expertise in federal law enforcement specifically make it the lead agency in managing terrorist threats. The National Guard may be activated for support in certain situations, but they operate under the direction of civil authorities and not as the lead agency.