FILE - In this July 14, 2011 file photo, a dog runs as police clash with student protesters in Santiago, Chile. Stray dogs are truly Man's Best Friend for thousands of students and workers who demonstrate and clash with police nearly every day to press demands for education improvements, redistribution of Chile's wealth and environmental protections. (AP Photo/Luis Hidalgo, File)

Associated Press
FILE - In this July 14, 2011 file photo, a dog runs as police clash with student protesters in Santiago, Chile. Stray dogs are truly Man's Best Friend for thousands of students and workers who demonstrate and clash with police nearly every day to press demands for education improvements, redistribution of Chile's wealth and environmental protections.  (AP Photo/Luis Hidalgo, File)
FILE - In this July 14, 2011 file photo, a dog runs as police clash with student protesters in Santiago, Chile. Stray dogs are truly Man's Best Friend for thousands of students and workers who demonstrate and clash with police nearly every day to press demands for education improvements, redistribution of Chile's wealth and environmental protections. (AP Photo/Luis Hidalgo, File)
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