Iran's President Mahmoud Ahmadinejad
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Cuba welcomes Iran's President Mahmoud Ahmadinejad

Iran's President Mahmoud Ahmadinejad has received a warm welcome in Cuba, as he continued a whistlestop tour of his allies.

Meanwhile, tensions remain high between Tehran and Washington, with Iran blaming Israel and America for the assassination of a nuclear scientist in car bombing on Wednesday.

Sarah Rainsford reports.