Defeating the Islamic State of Iraq and the Levant (ISIL) group, pushing Iranian influence out of Syria, and the removal of Assad are priorities for the U.S. administration, Nikki Haley said in an interview to CNN, which will air in full on Sunday.
The United States accuses the regime of President Bashar al-Assad of using chlorine gas mixed with a highly toxic sarin-like nerve agent in an air attack. "In no way do we see peace in that area with Assad as the head of the Syrian government".
Syria's Foreign Ministry condemned the U.S. strike as "a flagrant aggression" against the country and said Washington's real objective was to "weaken the strength of the Syrian army in confronting terrorist groups".
But he suggested that Trump was seeking a global political response for regime change from US allies as well as Russian Federation, which he said needed to reevaluate its support of Syria.
In his first televised interview, H.R. McMaster pointed to dual US goals of defeating the Islamic State group and removing Assad.
"I think the real failure here has been Russia's failure to live up to its commitments under the chemical weapons agreements that were entered into in 2013", he said on ABC's This Week.
Earlier this week, a suspected chemical attack hit the town of Khan Sheikhun in Idlib, killing at least 87 civilians, including 31 children.
Microsoft Office vulnerability lets hackers use Word files to install malware
McAfee said it identified the attacks on Thursday and chose to release its advisory immediately, which appeared late on Friday. The document that triggers the OLE2Link vulnerability is an RTF document that masquerades as a Microsoft Word DOC file .
The United States confounded the global community on Thursday night by ordering missile strikes on the Shayrat airfield in Western Syria as a response to last week's chemical attack in a town in the Idlib province of the country.
After previous gas attacks in Syria which the West blamed on the Assad regime, Mr Putin made a deal with former-President Barack Obama to scrap Syria's arsenal of deadly chemical weapons.
"The nation of Iran will remain alongside the Syrian nation in fighting terrorism and safeguarding Syria's territorial integrity", Rouhani said in the call on Saturday evening, according to a statement on the presidency website.
The US air strikes are likely to lead to global instability.
Tillerson's more restrained language may reflect his plans to visit Moscow for meetings this week, however, where he hopes to bridge the latest tensions in ties.
Washington has described the incident as an attack perpetrated by Syrian state forces.
But Ms Haley warned that the USA was prepared to "do more" if needed, leaving the door open for more military intervention as the global community awaits a response from President Assad and his allies.