President Donald Trump declared, "Mission Accomplished!" on Saturday after the US and its allies hit at least three chemical and biological weapons facilities in Syria with more than 120 missiles in a coordinated pre-dawn attack.
It was, instead, about the use of chemical weapons, May said.
Toronto resident Bayan Khatib was at a community fundraiser with other Syrian Canadians on Friday night when she learned the USA, the United Kingdom and France had launched the joint airstrikes in retaliation for a suspected chemical-weapons attack on April 7 that killed 43 people and injured hundreds more in a rebel-held enclave near Damascus.
The White House said Trump spoke to British Prime Minister Theresa May and French President Emmanuel Macron later on April 14. The Pentagon said the United States had "deconfliction" contacts with Russia before and after the strikes, that Syrian air defence systems had been largely ineffective and there was no indication that Russian systems had been employed.
Trump tweeted Sunday that the strike was perfectly carried out and that the only way the Fake News Media could demean was by my use of the term Mission Accomplished.
"The aggression is a flagrant violation of worldwide law, a breach of the global community's will, and it is doomed to fail", said state news agency SANA.
The trilateral operations came with questionable legitimacy due to the lacking of proof that could show Syrian government behind the chemical attack, and has been widely criticized by Syria, Russia and Iran, among other nations.More news: CWG 2018: Mary Kom India's flagbearer at closing ceremony
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Mr Trump has also defended his use of the phrase "Mission Accomplished" to describe the US-led missile attack on Syria's chemical weapons program. "Our warnings have been left unheard.We warned that such actions will not be left without consequences", Ambassador Anatoly Antonov said in a statement.
"These limited strikes may serve to deter future chemical weapons use, but assuming they don't trigger escalation or a retaliation, they won't dramatically alter the course of the conflict", Emma Beals, a Beirut-based expert who has been monitoring the war in Syria, said on Twitter. "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".
And it would establish a new body to determine responsibility for chemical attacks, call for a cease-fire in Syria, unimpeded access for all humanitarian aid, and an urgent resumption of negotiations on a political settlement.
According to the Russian Defense Ministry, the three countries fired over 100 cruise and air-to-surface missiles, most of which were shot down by Syrian air defense.
Russian Federation filed a draft resolution condemning the missile attack as a violation of global law and the UN Charter, and demanding the U.S. and its allies cease aggression against Syria.
But Chris Edelson, an American University professor who studies presidential war powers, said Trump - like previous presidents - has taken advantage of congressional gridlock to enhance the war powers of the president.
A number of non-governmental organizations, including the White Helmets, earlier said chemical weapons had been used in Douma, Eastern Ghouta, on April 7.