What did the federal government prioritize to improve security post-9/11?

The federal government prioritized enhanced domestic intelligence collaboration post-9/11 because the attacks highlighted significant gaps in information sharing among various agencies. Before September 11, 2001, intelligence gathered by one agency often failed to reach others, leading to missed opportunities to connect the dots regarding possible terrorist threats.

In response, measures such as the establishment of the Department of Homeland Security and initiatives to foster cooperation between federal, state, and local law enforcement agencies were implemented. These efforts were aimed at improving the flow of critical information and conducting joint operations to better prevent and respond to potential threats. This collaborative approach ultimately aimed to create a more unified homeland security framework, which was recognized as essential for enhancing the nation's overall security posture.

The other options, while possibly relevant in different contexts, do not capture the primary focus on improving collaboration among domestic intelligence agencies that was a key takeaway from the post-9/11 restructuring of national security policy.