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Over the past several days, Times reporters and editors have been working on identifying and telling the stories of the people in the image above, a frame from a video filmed at the moment of the first explosion at the Boston Marathon. We have found many of the people seen here, but would like your help in identifying more. Are you visible in this photograph taken Monday afternoon or do you know someone who was there? Please fill out this online form and include your location. A reporter or editor will follow up on all relevant leads.
