Terror on the Ground
Still from video by Evan Fairbanks, Magnum Photos
At 9:03 a.m. ET United Airlines Flight 175 crashed into the World Trade Center's south tower, as seen in a still from a video taken from the ground on 9/11.
By hijacking four planes as part of the 9/11 attacks, terrorists took the lives of nearly 3,000 people in New York City, Virginia, and Pennsylvania. (See a time line of the events of 9/11.)
National Geographic photo editors have chosen 25 iconic images that tell the stories of one of the country's darkest days.
"After ten years, I think many of the images from 9/11 still convey the rawness and brutality of the attack. It seems to me that they still have the capacity to shock," said Clifford Chanin, an executive at New York City's National 9/11 Memorial and Museum and editor of Memory Remains, a photographic book of 9/11 artifacts.
Warning: This gallery contains graphic content.
Updated September 11, 2012