They Were There: 9/11 PhotographersLIFE.com spoke with photographers about the powerful images they captured on Sept. 11, 2001.

Spencer Platt: City Aflame
Spencer Platt, a photographer for Getty Images, was nudged out of bed by his wife, who told him that a plane had collided with one of the Twin Towers. Platt groggily left their Brooklyn apartment and was headed toward lower Manhattan when he realized something was terribly wrong; people around him were panicking. He broke into a jog over the Brooklyn Bridge and saw it.
"I was struck by the acrid black smoke bellowing from the north tower," he told LIFE.com. "I placed the camera to my eye and took a few images on my new digital camera, which I was not yet accustomed to. In fact, I should have missed the explosion of the south tower, because I had only put the camera to my eye for a second to check on the focus when the second plane hit and the fireball erupted. I instinctively pressed the motor drive." A cab driver nearby noticed that Platt had captured the awful moment. "As I scrolled back through the pictures to make sure it really existed on my LCD, the taxi driver ran up to me. He screamed, 'He's got, he's got it!'—as if what we had all just witnessed wasn't yet reality until we confirmed it on a screen."
Spencer Platt, who won the World Press Photo of the Year award in 2006, remains a staff photographer for Getty Images.
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http://www.slate.com/slideshow/news-pol ... ?GT1=43001======
Comments are good to read as well.
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More photos-

Paul J. Richards: 'We're Under Attack'
Paul J. Richards was part of the press pool travelling with President George W. Bush when, in the middle of a routine photo op at a Florida elementary school, he noticed that the president's aides were suddenly agitated and that every news producer's cell phone was going off. His instincts told him he needed to get into position to catch Bush's reaction when the president was told what was going on.
"I could hear talking from the back room—someone talking to the staff, getting all worked up. I was thinking, I'm in the wrong place, I need to be in dead center. Then [White House Chief of Staff] Andrew Card popped out of a door." Card whispered something to the president, as Richards took this photo. "He later told me that he said, 'Sir, we're under attack.'"
Richards is now chief photographer and assignment editor for the Washington, D.C., bureau of Agence France-Presse.
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Thomas Franklin: Shades of Iwo Jima
Thomas Franklin's photo of four firefighters struggling to raise an American flag in the late afternoon after the attacks quickly became a symbol of a nation's resilience and is still often compared to Joe Rosenthal's famous World War II photo of the raising of the flag at Iwo Jima.
But when he took it, Franklin had no idea it would become such an iconic image. "It was just one of thousands from that day. It didn't really separate itself from the other pictures I took until much later. My focus was just trying to capture as much as I could, as best I could."
Franklin actually took the photo almost as an afterthought as he was about to leave the scene at about 5 p.m. "I figured I'd shoot one last picture before I left for New Jersey, and that's when I saw the firemen. It wasn't an orchestrated thing, it wasn't a performance, they just did what they did. I saw it from the corner of my eye from the triage ara, one of a series of photos I took in less than a minute. It was over that quickly."
Franklin is the multimedia editor for NorthJersey.com, where he recently completed a video project about Sept. 11 photojournalists for the 10th anniversary of the attacks.
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10 photos total at link.