"Clearly the Assad regime did not get the message past year", Mattis said.
"A perfectly executed strike", Mr Trump tweeted after US, French and British warplanes and ships launched more than 100 missiles almost unopposed by Syrian air defences.
Explosions have been reported in rural Aleppo amid claims an Iranian military base in Syria has been bombed by fighter jets. Besides that being an unfortunate echo of former President George W. Bush's premature victory declaration during the Iraq war, it's unclear how much the USA has accomplished. "So it was mission accomplished".
Their real impact will be on the plummeting relationship between Moscow and the West. "This persistent pattern of behavior must be stopped - not just to protect innocent people in Syria from the horrific deaths and casualties caused by chemical weapons, but also because we can not allow the erosion of the global norm that prevents the use of these weapons".
Stoltenberg also faulted Russian Federation, which he said was aiding Bashar al-Assad and had allowed his forces to operate in the area where the most recent chemical attack occurred. Russian President Vladimir Putin calls it an "act of aggression" that will only worsen the humanitarian crisis in Syria.
The Russian ambassador to the U.N., Vasily Nebenzia, called the attacks "hooliganism in global relations" and is accusing the US and its allies of acting before worldwide inspectors have concluded their investigation.
The Syrian foreign ministry called the attack a "blatant violation of the worldwide law" and said it was an attempt to derail the investigation into the alleged chemical attack on April 7, which President Donald Trump quickly blamed on the Syrian government.
Since earlier Saturday, state television showed peaceful scenes in Damascus, home to at least one of the targets of this morning's airstrikes on Syria. The strikes, a joint operation between the US, United Kingdom and France, targeted three locations associated with the production and storage of chemical weapons: a scientific research center; a storage center for sarin and its precursor components; and a chemical weapons storage facility and command post, according to Chairman of the Joint Chiefs of Staff Gen. Joseph Dunford.
· British Prime Minister May cited reports that said the Syrian government had used barrel bombs to deliver the chemical weapons.
"It proves high efficiency of the Syrian armament and professional skills of the Syrian servicemen trained by the Russian specialists", Rudskoy said at a Ministry of Defense media briefing. Similarly, we need to look at ways to undermine the scores of Shiite militias that Iran has assembled to fight in Syria in support of the Assad dictatorship. The NATO alliance gave its full backing.
Mattis said Friday that the United States had not yet confirmed that the suspected Syrian chemical weapons attack included the use of sarin gas.
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Haley said the US was prepared to sustain the pressure if the Syrian regime was "foolish enough to test our will".
That did not mean military strikes would continue. "This time our allies and we have struck harder", Mattis said.
In short, Assad should have nothing to fear from using chemical weapons again. "Chemical weapons have been prohibited for decades and we must enforce this prohibition".
Having been briefed by military advisers at Downing Street after the 2am strikes, May said that she was "confident" they had been successful. However, McKenzie acknowledged that some unspecified portion of Assad's chemical arms infrastructure was not targeted.
"When you shoot iron into the air without guidance, it is going to come down somewhere", McKenzie said.
For or against it, University of Chicago political science professor Robert Pape doesn't think they'll make much difference.
"It does not exist anymore". In an apparent slight at Trump, who claimed this week that the new missiles would be "nice, new and smart", Moscow said some of the equipment was designed as long ago as the 1950s. Last year's chemical weapons attack killed dozens civilians, as did this one.
A total of 105 missiles were launched in the strikes, according to the Pentagon.
He said the missiles hit the "sweet spot", doing the expected level of damage while minimizing the unintentional release of toxic fumes that could be harmful to nearby civilians. The missiles hit multiple aircraft and air shelters, and destroyed the fuel area.
The U.S. argues that the horrific chemical weapons attack in the suburbs of Damascus last Saturday is a burden Russian Federation must bear, as it failed to ensure that the Syrian regime abandoned its chemical weapons, as the Obama-era agreement required.
A global chemical warfare watchdog group, the Organisation for the Prohibition of Chemical Weapons, said its fact-finding mission would go as planned in Douma. In a separate White House address, he said: "Today, the nations of Britain, France, and the United States of America have marshaled their righteous power against barbarism and brutality".
What do we know about the strikes themselves?
He says there is "no doubt" that the Syrian government is responsible.