Speaking to an emergency session of the United Nations Security Council on Saturday, Nikki Haley, the US ambassador to the United Nations, said: "If the Syrian regime uses this poisonous gas again, the United States is locked and loaded."
Russia's resolution condemning the missile attacks as a violation of international law was heavily rejected at the UN Security Council.
Moscow called the council into emergency session to condemn the US-led action, but it was supported only by two other countries in the 15-member body.
Al Jazeera's Mike Hanna reports from the United Nations.
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