What do we know about the strikes themselves?
Mr. Trump described a very specific type of target that the US would go after, which are Syria's chemical weapon capabilities.
Mattis described them as a "one-time shot" to send a strong message to Assad not to use chemical weapons again.
- French forces used Mirage and Rafale fighter jets with four frigate warships to launch 12 cruise missiles.
· The three nations reportedly fired around 100 missiles.
She added that the strikes were not about "regime change".
The US however insist a "deconfliction channel" with Russian Federation continues to operate, details of which remain secret.
What was the result on the ground?
"The United States is locked and loaded", she said.
Several large explosions have been heard in the Syrian capital Damascus.
Where does the evidence on the gas attack stand?More news: Russian President Putin says strike on Syria will exacerbate humanitarian catastrophe
A Pentagon briefing later said the strikes had "set the Syrian chemical weapons programme back for years".
Trump took to Twitter and thanked his allies in the attack as well. "These three targets seemed to hit the sweet spot and do that", McKenzie said.
Nikki Haley said: "When our president draws a red line, our president enforces the red line". The strikes were his first major military involvement since taking office previous year.
US President Donald Trump addresses the nation on the situation in Syria April 13, 2018 at the White House in Washington, DC.
British Prime Minister Theresa May stressed that the military action was targeted and limited.
German Chancellor Angela Merkel welcomed the move and said the strikes were a "necessary and appropriate military intervention".
NATO Secretary General Jens Stoltenberg said he strongly supported the US, UK and France's airstrikes.
Western countries blamed Syria's government for a chemical attack on a rebel-held area earlier this month that killed more than 40 people.
However, President Vladimir Putin has denounced the strikes, calling them an "act of aggression".
With nationalist music blaring in the background, small groups of residents gathered on the streets in several locations in Damascus, waving the Syrian flag as well as the flags of Iran and Russian Federation, which have supported Assad in the seven-year-old civil war.
Its foreign ministry said: "We welcome this operation which has eased humanity's conscience in the face of the attack in Douma".
Whether or not Mr Assad is deterred by the latest strike-and warnings of more to come if he continues gassing his people-it will do little to alter the the course of Syria's civil war.