"When our president draws a red line, our president enforces the red line", she added.
Behind closed doors, Trump pushed for a more aggressive response than the one taken previous year, wanting options that would involve attacks on targets in Syria associated with Russian Federation and Iran, officials said. He acknowledged, however, that Syria retains "residual" capacity, but gave no details about what could be left.
US Defence Secretary James Mattis said the 100 air strikes were a "one time shot" to send a strong message to Syrian President Bashar al-Assad, selecting targets that would minimise the risks to innocent civilians.
Her statement came before the Security Council voted against a Russian resolution that would have condemned the missile strikes, with eight nations rejecting the resolution, four abstaining, and three countries-Bolivia, China, and Russia-voting in favor of it.
The town of Douma, the site of a suspected chemical attack last weekend, was among a dwindling number of rebel-held areas as Assad expands his control.
The demonstrations in support of Assad were carried live on state TV.
Britain argued that the strikes were "both right and legal" to alleviate humanitarian suffering from repeated use of toxic gas in attacks in Syria's seven-year war.
One site hit by the barrage of missiles was the Bazrah Research Center, a scientific research center on the outskirts of Damascus.
World closes ranks: Russian Federation and Syria have found little support for their position.
Pentagon officials said none of the 105 allied missiles fired were hit by Syria's Soviet-era antimissile fire.
Marine Lt. Gen. Kenneth F. McKenzie, director of the Joint Staff at the Pentagon, said the allied airstrikes "took out the heart" of Assad's chemical weapons arsenal.
"I believe that there was materiel and equipment associated with each of these sites that was not movable, and that's what really sets them back", he said.More news: Russia, Iran Denounce Airstrikes on Close Ally Syria
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"Last night, operations were very successful", Pentagon spokesperson Dana White said at a briefing Saturday morning.
Syria disputed even the most basic facts about the assault.
As the attack unfolded, Moscow claimed that 71 out of 103 missiles were intercepted by Russian-made Syrian air defenses.
The Pentagon also said that it was not aware of any civilian causalities at the time.
Haley said the airstrikes did not change US strategy in Syria.
The Kremlin is also busy with a Big Lie effort to deny that Assad used chems against the rebels, sometimes insisting the attack was faked, sometimes blaming the White Helmets, a Free Syrian relief group and sometimes fingering the Brits - whom it has also blamed for last month's Russian chemical-weapon assassination attempt on United Kingdom soil.
In last year's strikes, the Pentagon said missiles took out almost 20 percent of the Syrian air force. The response was an attempt to weaken Assad's capabilities, and make the prohibition of chemical weapons clear. But the airfield targeted by the Pentagon resumed operations shortly after the attack and, according to Western intelligence assessments, chemical attacks resumed. An already difficult battle plan - which required hitting Assad without provoking Russian reprisals or injecting the USA further into Syria's seven-year civil war - was getting harder. But the Chemical Weapons Convention, which Syria joined as part of the 2013 deal, prohibits the use of any chemical as a weapon. They will collect soil samples and talk to witnesses to try to pin down what occurred.
Russia's Permanent Representative to the United Nations Vassily Nebenzia denounced the West's actions as "hooliganism" and demanded an end to the military attacks and any future aggressions: "You are not only placing yourselves above global law, but you are trying to re-write worldwide law", Nebenzia said.
"While the available information is much greater on the chlorine use, we do nothave significant information that also points to sarin use", a senior administration official said in a call to reporters, CNN reports.
French Rafale jets, British Tornado jets and US B-1 bombers took part in the Friday night raid, launching from bases in Cyprus, France and possibly Qatar, where the U.S. earlier this month deployed several attack aircraft. "They just determine the substance", Ms Nauert added.