"Two men struggle after being overcome by tear gas  fired during clashes with the Israeli police on May 15, 2011 at  Qalandiya checkpoint near Ramallah, West Bank." (Uriel Sinai/Getty Images)

"Two men struggle after being overcome by tear gas fired during clashes with the Israeli police on May 15, 2011 at Qalandiya checkpoint near Ramallah, West Bank." (Uriel Sinai/Getty Images)

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