Many have seen the images of the collision, the burning towers, the fall and the rubble. Most of us remember exactly where we were and what we were doing on September 11, 2001 when New York was attacked. Eight Magnum Photographers were there at what later became known as ground zero. In this story they give their eyewitness accounts of the attack and their perspectives on the consequences, five years later.

Between September 3-11, 2005, Magnum photographer Larry Towell and Mississippi novelist Ace Atkins set out to document the aftermath of Hurricane Katrina—the worst natural disaster in US history. Driving from Bayou La Bartre, Ala. to Grand Isle, La., they encountered the victims of the storm and the horrible imprint it had left behind. This is what they witnessed in the wake of Katrina.