How 9/11 changed the world forever

The world experienced a vast shift in the wake of the terror attacks on Sept. 11, 2001. Norah O'Donnell takes a look at some of the larger effects.

ABC News spoke with first responders about illnesses linked to dust, smoke and debris exposure at ground zero 25 years later— and their fight for benefits.

Reflecting on twenty-five years since the Sept. 11 attacks, Stuart Gottlieb examines how the tragedy reshaped American foreign policy, shifted focus toward non-state actors, redefined terrorism as warfare, and emphasized the need for a long-term battle of ideas.

We Were Born into a Post-9/11 World National Review