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Baghdad, IRAQ: US Defence Secretary Robert Gates (R) meets members of the Iraqi Army and Iraqi police during a visit to a joint security station in Baghdad, 16 June 2007. Gates met his top commanders in Baghdad 16 June to assess security following the latest round of tit-for-tat sectarian attacks against Iraqi shrines. AFP PHOTO / POOL / ANDREW GRAY (Photo credit should read ANDREW GRAY/AFP via Getty Images)

Baghdad, IRAQ: US Defence Secretary Robert Gates (R) meets members of the Iraqi Army and Iraqi police during a visit to a joint security station in Baghdad, 16 June 2007. Gates met his top commanders in Baghdad 16 June to assess security following the latest round of tit-for-tat sectarian attacks against Iraqi shrines.   AFP PHOTO / POOL / ANDREW GRAY (Photo credit should read ANDREW GRAY/AFP via Getty Images)