It was a generation ago when the 9/11 terrorist attacks killed nearly 3,000 Americans. How many of the post-9/11 generation know what happened that day? And how many of us who lived through it know what allowed that tragedy to happen?

Homeland security is no less at-risk today than it was 21 years ago. To avoid yet another catastrophe, we would do well to revisit some key findings from the 9/11 Commission.

The commission found four failures across the government: imagination, policies, capabilities, and management. With respect to imagination, the commission found that political leaders did not understand the gravity of the terrorist threat posed by Al Qaeda. It was barely discussed among the public, media, or Congress.

The current administration’s open border policies, combined with that same lack of imagination, are actively undermining our national security.

Read the full article in the Federalist here.