In 2013, Parliament defeated a call by then-Prime Minister David Cameron for airstrikes in response to an earlier chemical attack in Syria.
Syrian government forces have regained full control of the city as the worldwide community considers its response.
In response, Trump tweeted that while Russian Federation vowed to protect Syria against attack, "Get ready Russian Federation, because [attacks] will be coming, nice and new and "smart!"
Last night however, the White House said the president was still assessing the American response - with all options remaining on the table.
Although Mr. Mattis noted that military action carried risks, he also emphasised that Syrian use of chemical weapons should not be tolerated.
After Ms. May met with her Cabinet, a spokesperson issued a statement saying it is highly likely that Syria's President Bashar Assad was responsible for Saturday's attack that killed dozens outside Damascus.
British Prime Minister Theresa May called an emergency cabinet meeting for Thursday, with reports indicating that she has already ordered submarines to move within missile range of Syria.
Amid the talk of military action, the Kremlin, a close ally of Assad, countered that more "serious approaches" were needed to combat the crisis.
"On a strategic level, it's how do we keep this from escalating out of control, if you get my drift on that", he said.
"Nevertheless, we hope that common sense will prevail and worldwide relations will become constructive; the whole of the world system will become stable and predictable". That then deterred the USA administration of Barack Obama from similar action.
On Wednesday, US President Donald Trump threatened a direct strike on Syrian government forces, following an alleged chemical attack in the city of Douma, in a tweet that was followed by another one in which Trump claimed that Washington's relations with Moscow were worse than during the Cold War.
That would prove controversial, after opposition parties demanded the Government respects a recent convention that the House of Commons approves United Kingdom military intervention.
"That's a case that I've made going back many, many years in Parliament", he added.
Wictor stated that the photographs suggest that Special Forces carried an attack, which included using bombers, missiles, heavy machine guns and light cannons.
"We can not risk an escalation even further than it's gone already".
President Donald Trump speaks during an event on tax policy in the Rose Garden of the White House, Thursday, April 12, 2018, in Washington.
Asked to comment on possible US strikes, Peskov said "it's necessary to avoid any steps that may fuel tensions in Syria".
The bombing represents a major escalation in the West's confrontation with Syrian President Bashar al-Assad's superpower ally Russian Federation, but is unlikely to alter the course of a multi-sided war that has killed at least half a million people in the past seven years.
He said the United States military was ready to provide the President with military options, if appropriate and at the President's request.