Pentagon: No doubt Syria behind gas attack

James Mattis April 11 2017 01

Pentagon: No doubt Syria behind gas attack

Situation Room

Defense Secretary James Mattis says he has no doubt that Syrian President Bashar al-Assad's regime was behind the chemical attacks against civilians. CNN's Barbara Starr reports.

02:29 - Source: CNN

US military strike against Syria 15 videos

James Mattis April 11 2017 01

Pentagon: No doubt Syria behind gas attack

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James Mattis April 11 2017 01

Mattis: No doubt Syria behind gas attack

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White House press secretary Sean Spicer speaks during the daily press briefing, Thursday, March 30, 2017, at the White House in Washington.

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3067918 04/07/2017 The United States launched a military strike on a Syrian airbase Thursday. A plane in a shelter. Mikhail Voskresenskiy/Sputnik via AP

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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)

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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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