The missiles didn't strike any locations where Russian military forces are based; instead, hitting targets they believe are Syrian government chemical weapons labs.
Haley also said the response by the Trump administration was "cumulative", taking into account not only the recent chemical weapons attack in Douma, but also other, smaller, attacks.
"The objective of our actions tonight is to establish a strong deterrent against the production, spread and use of chemical weapons", Trump said.
"When our president draws a red line, our president enforces the red line", Haley stressed.
UK Prime Minister Theresa May shared a similar sentiment in her public address, saying the strikes have not escalated tensions in the region and that everything had been done "to prevent civilian casualties".
A BARRAGE of cruise missiles rained down on Syrian regime's poison fuel amenities into the in a single day and into the early hours on April 14.
Common Joseph Dunford, chairman of the US Joint Chiefs of Employees, advised reporters at a Pentagon briefing: "Necessary infrastructure was destroyed which is able to lead to a setback for the Syrian regime". He said the missiles hit the "sweet spot", doing the expected level of damage while minimizing the unintentional release of toxic fumes that could be harmful to nearby civilians.
Officials said this did not include giving Russian advance notice of where or when allied airstrikes would happen.
Russian Federation supports Syrian President Bashar al-Assad and has military personnel in Syria, creating a risk of armed confrontation between Washington and Moscow surrounding the country's long running civil war.
What type of missiles were fired?
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President Vladimir Putin "severely" condemned the strikes on Syria, adding that Washington was already responsible for the "bloodbath in Yugoslavia, Iraq and Libya".
British Prime Minister Theresa May and French President Emmanuel Macron were both due to face their respective legislatures later in the day over their decision to join the U.S. in launching missiles at suspected chemical weapons sites in Syria, in an attempt to punish the Bashar al-Assad regime.
SIMON: Charles, remind us, again, what is the Russian interest in Syria?
Florence Parly, France's defence minister, said France provided warships in the Mediterranean Sea and sent in fighter jets stationed at airbases in France. And it would establish a new body to determine responsibility for chemical attacks, call for a cease-fire in Syria, unimpeded access for all humanitarian aid, and an urgent resumption of negotiations on a political settlement. Neither Mattis, nor Dunford, were willing to discuss Syrian or Russian resistance to the strikes.
Assad's Barzah research and development center in Damascus was destroyed, McKenzie said.
Macron said in an interview broadcast by BFM TV, RMC radio and Mediapart online news that he had convinced Trump to focus on the chemical weapons sites.
The third, also located near Homs, contained a chemical weapons equipment storage facility and "an important command post", Dunford added.
"Insulting the president of Russian Federation is unacceptable and inadmissible".
Russian ambassador Anatoly Antonov stated on Twitter: "A pre-designed state of affairs is being applied". We warned that such actions will not be left without consequences.
"Insulting the President of Russian Federation is unacceptable and inadmissible".