He said that the Syrian leader had launched a "savage" chemical weapons attack previously and again recently.
Syrian President Bashar Assad has announced that the West's cruise missile and bombing attack on his country has only served to unite the population and increase Damascus's resolve to continue "fighting and crushing in every inch of the nation".
ABC News previously reported at least 40 people were killed in the suspected chemical attack.
Tonight, I ask all Americans to say a prayer for our noble warriors and our allies as they carry out their missions.
"We do not seek conflict in Syria, but we can not allow such grievous violations of worldwide law", she said, referring to the suspected chemical attack.
Russian President Vladimir Putin also called for an immediate emergency meeting of the UN Security Council to discuss the "aggressive actions" of the US, UK, and France.
USA ambassador to the United Nations Nikki Haley said Saturday that "the United States is locked and loaded" to strike Syria again if the country's regime continues to use chemical weapons.
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. He added that the US expects the Syrian government and its allies to conduct a "significant disinformation campaign", which the Pentagon would rebut with additional information Saturday morning.
France's conclusions were supported by Trump administration officials Saturday afternoon who determined that both chlorine and sarin, a highly toxic nerve agent, were used on the civilians by the forces under Assad in the April 7 attack.
Speaking on the attacks at a press conference this afternoon, Mr McKenzie Jnr said: "Initial indications are we achieved our military objections without material interference from Syria".
Syrian surface to air missile batteries had attempted to fire back, but there were no initial reports of allied losses, he added.
Israel, which has watched the winding down of the war on its northern doorstep with trepidation as Assad's allies consolidate their gains, has said it won't let Iran entrench militarily in Syria. A combined operation with the armed forces of France and the United Kingdom is now underway. "It is not about regime change", said Theresa May, Britain's prime minister.
"Last night, operations were very successful", Pentagon spokesperson Dana White said at a briefing Saturday morning. Earlier, Washington, London and Paris said these strikes were in response to an alleged chemical weapons attack in Douma, a suburb of Syria's capital.
The Russian ambassador to the U.S., Anatoly Antonov, condemned the airstrikes and warned that "such actions will not be left without consequences". Since that did not work, a more intense attack would aim to degrade his ability to carry out further such attacks, and would try to do this by hitting Syrian aircraft, military depots and chemical facilities, among other things.
The Barzah facility was hit by 76 missiles in total, the storage facility was hit by 22 weapons and seven missiles fell on the bunker.
The Russian military had vowed to respond to any attack, and Russian President Vladimir Putin's administration had repeatedly warned that Trump was taking America down a unsafe path.
European Union foreign-policy chief Federica Mogherini said the bloc "supports all efforts aimed at the prevention of the use of chemical weapons".
Karen Pierce, the British ambassador to the United Nations, said during the emergency meeting that a "significant body of evidence including intelligence" points to the Syrian regime as being behind the attack.
The Pentagon also said that it was not aware of any civilian causalities at the time.
"As other nations step up their contributions, we look forward to the day when we can bring our warriors home", Trump said.