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25 Most Powerful Photos

The South Tower of the World Trade Center explodes in flames after being hit by the hijacked airliner now universally known as "the second plane," United Airlines Flight 175, September 11, 2001. This photo -- with its black smoke; the shocking, brilliant, colossal flames; the cloudless sky; the beautiful Brooklyn Bridge flying the American flag -- captures so much of the story of the day that, if one were to create a composite picture to illustrate the idea of "9/11," the result might look very much like this astonishing shot. (Photo: STR/Reuters /Landov) For the full photo collection, go to LIFE.com

9/11: The 25 Most Powerful Photos

Yahoo Canada News
September 11, 2012

Thirteen years after 9/11, an unsettling number of images from Ground Zero and its environs remain seared in our collective memory -- unsurprising, perhaps, given the scope and scale of the destruction. But the fact that the deadliest, most visually arresting attacks occurred in New York City also meant that many of the world's best photographers were, in effect, already on the scene when the terrorists struck. In hopes of lending coherence to our shared, turbulent recollections, LIFE.com presents the 25 most stirring, visceral photographs from that day, featuring pictures from the likes of James Nachtwey, Joe Raedle, Spencer Platt, Mario Tama, and other celebrated photojournalists (and one intrepid amateur). These are the pictures we remember: wrenching, indelible photographs that tell the tale of a still-resonant late summer day that changed everything.