Although the operation was secretly unfolding for hours before the first impact, it only took minutes from the first to the last detonation from 105 precision-guided missile strikes on three Syrian chemical weapons targets, officials said. No casualties have been reported. "It was done on targets that we believed were selected to hurt the chemical weapons program". He said another attack with "a number of missiles" targeting a scientific research center in Barzeh, near Damascus, destroyed a building and caused other material damage but no human losses.
The operation was "precise, overwhelming and effective", McKenzie said, adding it will set their chemical weapons programme back "for years".
All three allies fired 22 weapons at the Him Shinshar Chemical Weapons Storage Site just west of Homs, and the US military launched seven missiles at the Him Shinshar Chemical Weapons Bunker, McKenzie said.
The third target, also to the west of Homs, was described as "a chemical weapons equipment storage facility and an important command post".
US officials said there was no indication so far that Syrian air defenses struck attacking Western aircraft or ships.
In the wake of Friday's strikes, Congress should engage in a vigorous examination of Trump's overall Syrian policy. "The United States of America will not allow the Assad regime to continue to use chemical weapons". The use of which, she says, "is inexcusable" and "illegal".
The main town in Eastern Ghouta, and the last to have escaped government control, is Douma, the site of the alleged chemical attack on April 7 that prompted the unprecedented Western reaction. Thousands of rebels and civilians have since been bussed out of the town under a Russian-brokered deal. Pictures from opposition supporters circulated on social media showing lifeless bodies piled in basements. Last year's chemical weapons attack killed dozens civilians, as did this one. Last year, the US carried out the attack on its own.
Turkey, a North Atlantic Treaty Organisation member with forces in northern Syria fighting Kurdish militants, welcomed the strikes and described them as a proper action against the Assad regime.
Some critics, like Northwestern University political science professor Ian Hurd, say the decision to strike might be more about distracting from President Trump's political scandals than confronting the Assad regime. "So we are very confident that we have significantly crippled Assad's ability to produce these weapons".
The Russian military had vowed to respond to any attack, and President Vladimir Putin's administration had repeatedly warned Trump was taking America down a risky path. Syrians were also shown gathering in central squares in Aleppo waving Syrian flags and saying that they would never kneel to foreign enemies.
Announcing the military action from the White House, Mr Trump said the three allies had "marshalled their righteous power against barbarism and brutality".
He said France, together with the USA and the United Kingdom, would soon submit a draft resolution on Syria, aimed at dismantling the chemical weapons program in the country, eradicating terrorism, ensuring a cease-fire and finding a sustainable political solution to the conflict.
President Donald Trump declared "mission accomplished" in Friday night's strike on three Syria targets and argued that it "could not have had a better result". "When our president draws a red line, our president enforces the red line".
Russian Ambassador to the United Nations Vassily Nebenzia speaks during an emergency Security Council meeting on Syria at U.N. headquarters in New York, April 14, 2018. Four council members - Ethiopia, Kazakhstan, Peru and Equitorial Guinea - abstained, while the remaining eight members voted against. "We have sent a clear message to Assad and his murderous lieutenants".