Today is a day for remembering. MSNBC, as it has every September 11 since 2001, is re-airing, in full, its original coverage of the morning—shock, confusion, realities setting in. The New York Times and The Huffington Post are leading their sites with photos—the Times, a slideshow of today’s memorials; the HuffPo, a striking still of the burning towers—both of them eloquently headline-less.

On Twitter, there’s a makeshift memorial of a different kind: the #whereiwas stream. Some entries, from journalists:

@pwgavin: I was teaching a 7th grade history class in NJ. We quickly sent all kids home. One 5th grader lost a parent in the WTC. #whereiwas

@nancyscola: It was my third or so day of work in the House. We evacuated, and once we got outside the building Capitol Police told us to run. #whereiwas

@brianstelter: The world history teacher said, “What channel is CNN on?” I said, “63.” When he turned TV off later, I left class and went home. #whereiwas

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Megan Garber is an assistant editor at the Nieman Journalism Lab at Harvard University. She was formerly a CJR staff writer.