[

Showcase: A Story, Waiting to Happen - Lens Blog - NYTimes.com](http://lens.blogs.nytimes.com/2009/07/29/showcase-29/):

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.