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FILE - In this April 22, 2010 file photo, people walk along the international border in Nogales, Sonora, Mexico as seen from Nogales, Ariz. As the days tick down until the Arizona immigration law takes effect, the state stands as a monument to the anger over illegal immigration that is present in so many places. The anger has been simmering for years, and erupted into a full-blown fury with the murder of a prominent rancher on the border earlier this year. The killing became a powerful rallying cry for immigration reform, but it does not tell the whole story about how Arizona got to this point. (AP Photo/Matt York, File)