The three targets - associated with the government's alleged research, development, and deployment of chemical weapons - were struck on Friday night in Syria, near Damascus and Homs, in response to a chemical weapons attack a week earlier that left scores of civilians dead.
OPCW inspectors have been attacked on two previous missions to the sites of chemical weapons attacks in Syria.
The US-led strikes did nothing to alter the strategic balance or dent Assad's supremacy, and the Western allies have said the aim was to prevent the further use of chemical weapons, not to intervene in the civil war or topple Assad.
"On our part, we consider the latest military adventure undertaken by the United States and its allies as a treacherous act of aggression against a sovereign state, against Syria, a member of the United Nations and the OPCW". He told reporters in Moscow that the inspectors could not go to the site because they need permission from the U.N. Department for Safety and Security.
Meanwhile, Washington's fight against the Islamic State has centered on cooperation between US special operations forces and the Syrian Democratic Forces (SDF), which has taken the lead in fighting and was presumed to have responsibility for holding the territory once it had been cleared. One reason we don't know (and may never know) the truth is that an global inspection team's arrival in Douma was pre-empted by the USA attack. The team arrived in Syria on Saturday. "We should never forget that there's conventional weapons being used every day that's killing Syrians", explains Sahloul.
"I can guarantee that Russian Federation has not tampered with the site", Foreign Minister Sergei Lavrov said. He said government officials met with the delegation several times to discuss cooperation.
Now that IS has largely been neutralized, all concerned parties should be able to focus on restoring peace in Syria and bringing the country back to normalcy, as its people of all political and religious backgrounds have suffered more than enough.
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The weekend missile strikes by the US, Britain and France were in response to an alleged chlorine and sarin gas attack in Douma on April 7 in which 40 people were said to have been killed. The OPCW team does not have a mandate to assign blame for the attack.
"We know they took off from these airbases because, for the last six years, we have had wireless devices that can listen in on regime forces. Unfettered access essential. Russian Federation and Syria must cooperate". Stoltenberg spoke in an interview with Turkey's NTV television on Monday.
In Damascus, hundreds of Syrians gathered Monday in Omayyad Square in Damascus, rallying in support of their armed forces, which they said had succeeded in confronting the airstrikes by the West.
And by Saturday morning an unverified video was released showing Bashar Assad, in suit and tie and briefcase in hand, going to work as usual.
The strikes have ratcheted up worldwide tension, as the US and Russian Federation exchanged threats of retaliation.
Yet even The New York Times was moved to express concern that "the new strikes posed the risk of drawing the United States more deeply into a conflict in which Russian Federation and Iran have more invested than ever in keeping Mr. Assad in power".
Amid a fierce war of words between Russian Federation and the USA and its allies, Moscow has said that a team of chemical experts from the Organisation for the Prohibition of Chemical Weapons (OPCW) will inspect the site of a suspected poison gas attack in Syria on Wednesday. "And on Wednesday is when we plan the arrival of the OPCW experts", a senior Russian official said in The Hague on Monday. The joint body was created in 2015 and found the Syrian government responsible for a sarin gas attack on Khan Shaykhoun, a rebel-held area in northern Syria a year ago. It said Syrian air defenses shot down most of the six missiles fired at the base. The Pentagon says no missiles were engaged.