Twenty-five years ago, the United States suffered the deadliest terrorist attack in its history. The September 11, 2001, attacks killed nearly three thousand people and inflicted a collective trauma on an entire nation, fundamentally altering the US national security apparatus, ushering in the “war on terror,” and leading to overhauls of US intelligence and homeland security. But the core problem of terrorism itself—which has existed for centuries—didn’t go away.
As the world reflects on the twenty-fifth anniversary of 9/11, we asked Atlantic Council experts to answer twenty-five pressing questions about how terrorism continues to shape the present era.
What was the long-term impact of the Iraq and Afghanistan wars on US national security?
By Paul D. Miller
How does the global terrorism landscape today compare with that of 2001?
