U.S. Ambassador to the United Nations Nikki Haley said in an interview broadcast Sunday that the Trump administration's response to a chemical attack in Syria sent an important message to Russia.

"The entire administration was in agreement that this was something that had to be done. This was something that needed to tell Assad, 'Enough is enough,'" Haley told NBC's "Meet The Press," referring to Syrian President Bashar Assad.

"And this is something to let Russia know, 'You know what? We're not going to have you cover for this regime anymore. And we're not going to allow things like this to happen to innocent people.'"

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Last week, the U.S. launched a missile strike on a Syria military air base. The strike was in retaliation for a deadly chemical attack earlier last week in northern Syria that the U.S. has blamed on Assad's administration.

Haley said during the interview the U.S. took a "moderate approach," but it's capable of doing much more.