Syrians look down at a poster of Syrian President Bashar al-Assad (L) and his late father and predecessor Hafez al-Assad in Damascus, as they watch the tourist train pass following the re-opening ceremony of the rail route between two neighbourhoods in the Syrian capital, Raboeh and Dumar, on May 1, 2015. AFP PHOTO / LOUAI BESHARA        (Photo credit should read LOUAI BESHARA/AFP/Getty Images)
What is Bashar al-Assad's goal?
CNN's Nic Robertson explores why Bashar al-Assad is still fighting to keep power.
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US military strike against Syria 14 videos
Syrians look down at a poster of Syrian President Bashar al-Assad (L) and his late father and predecessor Hafez al-Assad in Damascus, as they watch the tourist train pass following the re-opening ceremony of the rail route between two neighbourhoods in the Syrian capital, Raboeh and Dumar, on May 1, 2015. AFP PHOTO / LOUAI BESHARA        (Photo credit should read LOUAI BESHARA/AFP/Getty Images)
What is Bashar al-Assad's goal?
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MEDITERRANEAN SEA - APRIL 7:  In this handout provided by the U.S. Navy,The guided-missile destroyer USS Porter fires a Tomahawk land attack missile on April 7, 2017 in the Mediterranean Sea. The USS Porter was one of two destroyers that fired a total of 59 cruise missiles at a Syrian military airfield in retaliation for a chemical attack that killed scores of civilians this week. The attack was the first direct U.S. assault on Syria and the government of President Bashar al-Assad in the six-year war there.  (Photo by Ford Williams/U.S. Navy via Getty Images)
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MEDITERRANEAN SEA - APRIL 7:  In this handout provided by the U.S. Navy,The guided-missile destroyer USS Porter fires a Tomahawk land attack missile on April 7, 2017 in the Mediterranean Sea. The USS Porter was one of two destroyers that fired a total of 59 cruise missiles at a Syrian military airfield in retaliation for a chemical attack that killed scores of civilians this week. The attack was the first direct U.S. assault on Syria and the government of President Bashar al-Assad in the six-year war there.  (Photo by Ford Williams/U.S. Navy via Getty Images)
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