Marcy Borders, later called the "Dust Lady" because of this photo, escapes the North Tower of the World Trade Center after the terrorist attacks on September 11, 2001.
STAN HONDA/AFP/Getty Images/FILE
The rubble of the World Trade Center in New York City smolders following the terrorist attack on September 11, 2001.
ALEX FUCHS/AFP/Getty Images/FILE
Men take cover as a dust cloud from the collapsed World Trade Center towers envelops lower Manhattan on September 11, 2001.
Mario Tama/Getty Images/FILE
People walk in the debris-covered streets near the World Trade Center towers on September 11, 2001.
STAN HONDA/AFP/Getty Images/FILE
A man stands in the rubble after the collapse of the first World Trade Center tower.
DOUG KANTER/AFP/Getty Images/FILE
People run away as the North Tower of the World Trade Center collapses.
Jose Jimenez/Primera Hora/Getty Images/FILE
Firefighters stand in the smoldering wreckage of the World Trade Center on September 13, 2001.