In a conference call with reporters on Saturday, senior USA administration officials said they had a large volume of clear and compelling information, both of chemical weapons use and of President Bashar al-Assad's culpability in the attack.
The bombings, hailed by US President Donald Trump as a success but denounced by Damascus and its allies as an act of aggression, marked the biggest intervention by Western countries against Assad and ally Russian Federation.
The U.S. Department of Defense released video footage of tomahawk missiles being launched from a submarine in the Mediterranean Sea at targets in Syria as part of a "multi-national strike operation against the Syrian government".
France is urging Russian Federation to join a push for a political solution in Syria after joint U.S., French and British attacks on Syrian chemical weapons sites.
The Western trio swiftly reverted to diplomatic efforts, with leaders facing flak at home over the punitive attack. French President Emmanuel Macron spoke with Russian President Vladimir Putin on Friday, hours before the Western missile strikes.
Ryabkov said Russian Federation was guided by statements on the part of some Western countries' representatives that the US-led coalition has no current plans to continue attacks on Syria.
The US military said the strikes "destroyed" Him Shinshar's chemical weapons storage facility, and damaged the chemical weapons bunker.
The OPCW is set to meet in the Hague on Monday over the attack, although there have been no signs yet that the investigators have travelled to Douma to begin their fieldwork. "Chemical weapons use has become an all too regular weapon of war in the Syrian conflict", Wilson said, going on to cite 390 allegations of chemical weapons attacks since 2014.
Its team on the ground also faced the risk of arriving too late to a site where much of the evidence may have always been removed or tampered with.
Peter Wilson, the UK's OPCW envoy, told the watchdog body that failure to act in Syria will cause "further barbaric use of chemical weapons".
Regime forces have since entered Douma and declared the entire Eastern Ghouta region around it fully retaken, ending a five-year siege and reclaiming an opposition bastion on the edge of the capital.
That drew derision from his critics and parallels with ex-President George W. Bush's notoriously premature Iraq war victory speech on an aircraft carrier nearly exactly 15 years ago.
Haley said the United States would not pull its troops out of Syria until its goals were accomplished.
A United Nations-OPCW Joint Investigative Mechanism also looked at responsibility for chemical weapons use.
Those assertions have been denounced as lies by Western officials.
Western powers have no plans for further missile strikes on Syria but will assess their options if Damascus uses chemical weapons again, Britain's foreign minister said on Sunday as debate raged over the legality and effectiveness of the raids, Reuters reported.
Syria has lived through a seven-year civil war that has killed at least half a million people and created an global refugee crisis.
A Western draft resolution obtained by AFP at a meeting of the UN Security Council Saturday calls for unimpeded deliveries of humanitarian aid and enforcement of a ceasefire, along with demands that Syria engage in UN-led peace talks.
But Russia has blocked countless resolutions against its Syrian ally and the regime has appeared determined to continue its military reconquest of the country.
"For all the sound and fury of these strikes, their net effect is a slap on the wrist of Bashar al-Assad", said Nick Heras, an analyst at the Center for a New American Security.
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