For more than three years, Barack Obama has been trying to avoid getting into a fight in Syria. But this week, with great tracts of the Middle East under the jihadist's knife, he at last faced up to the inevitable. On September 23rd America led air strikes in Syria against both the warriors of Islamic State (is) and a little-known al-Qaeda cell, called the Khorasan group, which it claimed was about to attack the West A president who has always seen his main mission as nation-building at home is now using military force in six countries-Syria, Iraq, Afghanistan, Pakistan, Yemen and Somalia.
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