10 Heartbreaking Images of 9/11 That We Should Never Forget

1. Paola Braut, of Belgium, cries over a photograph of her son Patrice along the edge of the North Pool during memorial observances of 9/11.

2. Kayla Fallon, daughter of William Fallon who perished in Tower One when she was 8 years old.

3. A soot-covered fireman is helped away from the Twin Towers.

4. The rubble of the World Trade Center.

5. Marcy Borders, covered in dust, took refuge in an office building.

6. Smoke and ash covers southern Manhattan immediately after the collapse of the north tower

7. Pedestrians flee the scene.

8. United States Secret Service Agent Thomas Armas, carries an injured woman to an ambulance after Tower One of World Trade center collapsed.

9. Falling Man.

10. NYC fireman is going through the inferno that was once the World Trade Center towers.