US Secretary of State Rex Tillerson has criticised Russian Federation, saying it had failed to prevent Syria from carrying out a chemical attack on a rebel-held town.
"What America waged in an aggression on Syria is a crossing of red lines".
The statement warned the US that allies of Syria were "closely and deeply following American forces' moves and presence" in the areas of northern Syria and northwestern Iraq, and that they will "consider them [to be] an occupying force".
Secretary of State Rex Tillerson said that the strike does not signal a new US offensive in Syria, where there are already almost 1,000 USA troops focused on the fight against ISIS. Russian Federation had its own military personnel at the Syrian military airport that the US struck with cruise missiles.
Russian Federation and Iran have provided Mr Assad with critical military support in his war against rebel groups fighting to topple him.
A political solution to the war in Syria is not possible with President Bashar al-Assad in power, the USA ambassador to the United Nations has said in an apparent hardening of the Trump administration's position.
"It's very hard to understand how a political solution could result from the continuation of the Assad regime", McMaster said. Still, Haley said the US didn't see a peaceful future Syria with Assad in power.
While he did not rule out the future use of military force, he said the USA administration was mindful of "the lessons of what went wrong in Libya when you choose that pathway of regime change".
"What we're trying to do is, obviously, defeat ISIS", she continued, referring to the Islamic State in Iraq and Syria. "So, yes, I'm skeptical", she said.
Sir Michael said the attack had happened "on their watch" and that Vladimir Putin must now live up to previously made promises that Mr Assad's chemical weapons have been destroyed.
However, neither the convention nor the 2013 resolution indicated that breaches should trigger use of military force.
The Syrian foreign minister denied the government's involvement in the Idlib incident, saying it had never nor would it ever use chemical weapons on either civilians or terrorists operating in the country.
Asked whether she thought Russian Federation was trying to help Assad cover up the use of chemical weapons, Haley said either Moscow knew Assad had weapons that would be used or they were "played for fools by Assad and kept in the dark".
Tillerson insisted he had no concerns about possible Russian retaliation after the USA attack on the airbase.
Indeed, the dozens of cruise missiles launched from two US Navy ships reportedly did little to hamper Syria's air operations, as Syrian forces took off from the targeted airfield hours later. "At the time they reported that the Syrians had turned in all of their chemical weapons". Close to a half million people have been killed in the last five years and Assad, as the strong-arm ruler of the country, has to be blamed for his inhumane response to the revolt against him.
Several lawmakers said Sunday that decision shouldn't entirely be up to Trump.