Russia Caucasus Violence

  A police officer using a mobile phone takes a picture as others examine the site of a powerful explosion on the outskirts of Makhachkala, southern Russia, Friday, May 4, 2012. Two powerful explosions went off Thursday night near a traffic police post in the capital of Russia's restive Dagestan region. (AP Photo/Abdula Magomedov, NewsTeam)
A police officer using a mobile phone takes a picture as others examine the site of a powerful explosion on the outskirts of Makhachkala, southern Russia, Friday, May 4, 2012. Two powerful explosions went off Thursday night near a traffic police post in the capital of Russia's restive Dagestan region. (AP Photo/Abdula Magomedov, NewsTeam)

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