Associated Press
United States Attorney Melinda Haag, with local law enforcement representatives behind her, announces the arrests of 13 members and associates of the 500 Block/C Street gang during a news conference in South San Francisco, Calif., Thursday, May 3, 2012. Three Immigration and Customs Enforcement agents were shot and injured Thursday while serving "high-risk" warrants in the San Francisco Bay area, authorities said. The agents suffered non-life threatening injuries during an early-morning raid in Petaluma in connection with a 2010 gang-related triple homicide. (AP Photo/Eric Risberg)

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