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Robert Greenwald: It was very, very hard. We encountered in the Wal-Mart employees a tremendous culture of fear, which I had not anticipated. But it was an extended process of research, talking to people who knew people, who had heard of somebody. It was literally having co-producers go and live in certain communities for a period of time, and spending time there, and cultivating local contacts. It was working the phones. It was using leads that came about in articles from journalists. It was working with some of the terrific heroes in D.C. who do these really important studies – these papers from think tanks. For example, I learned about subsidies, the corporate subsidies, in the states where it was more prevalent. So we guided our research. We were able to work with someone who's done this amazing work around sweatshops around the world, and others, who pointed us in directions that led to our ultimately getting the story in China. It was lawyers who were cooperative in making some of the whistle-blowers available to us. So it was a very wide, complicated and consuming endeavor to find all these stories.