sarin

US struck Syria without certainty on sarin

Even though US intelligence agencies did not have absolute certainty Syria's regime had used the nerve agent sarin against civilians, the Trump administration still felt there was enough evidence to justify retaliatory strikes last Friday, several intelligence and defense officials tell CNN.

Mattis warns Syria against using chemical weapons

Secretary of Defense James Mattis has warned the Syrian regime against the use of chemical weapons, telling reporters Friday "you have all seen how we reacted to that, so they'd be ill advised to go back to violating the chemical convention."