Showcase: A Story, Waiting to Happen – Lens Blog – NYTimes.com:
Katie Orlinsky stood by herself in an enormous train yard on the outskirts of Mexico City, looking for the perfect photograph. A picture editor had told her she needed a dramatic image to embody her story about illegal Central American immigrants on their way by rail to the United States border: she had to stand on top of a moving train with one of the people she’d been following.