"The raging civil war in Syria, the violent conflicts around the world", he said, "require an global community that pulls together, that holds each other to account and that strives everyday not to repeat the awful mistakes of the past".
"I think the global community has pretty much spoken and Russian Federation is out there on an island saying that Assad didn't do it, because everybody else is very clear and knows that Assad did", she said.
At a press conference in Sarajevo, the Republican senator said the U.S.
"I have to say, the Libya experiment did not go well".
British Prime Minister Theresa May spoke on Monday to US President Donald Trump and agreed that "a window of opportunity" exists to persuade Russian Federation to break ties with Syrian President Bashar al-Assad, May's office said.
The president is not intimidated by Moscow's talk of war, his son said.
Western experts say sarin, a nerve agent, was used in the attack last week that killed more than 80 people.
"Russia must fully honour the commitments it made on Syria, Ukraine, and the Intermediate Range Nuclear Forces Treaty, and other topics of worldwide concern". But Tillerson appeared more equivocal, saying on Sunday the USA priority in Syria was the defeat of ISIS. "That is the offer Rex Tillerson is going to be making".
What has Tillerson said?
Live footage from the scene showed tall clouds of black smoke billowing just over the tarmac.
The airport said in a separate statement that the fire was outside the airport and it didn't affect its operations.
45 percent believe Syria's use of chemical weapons is immoral and a direct threat to the U.S.
A senior US official says the United States has concluded that Russian Federation knew in advance of Syria's chemical weapons attack last week.
Their comments came as Tillerson planned to meet with Russian officials.
Beyond the chemical weapons question, there is the larger issue of coming up with a strategy to deal with the Syrian quagmire.
Speaking after the meeting, Tillerson denounced Russia's "failure" to ensure the elimination of chemical weapons in Syria and said it had not made enough progress in peace talks.
Moscow has dismissed suggestions that the Syrian government that it backs could be behind the attack in Idlib province. The U.S. action may make it harder to put space between Putin and his Syrian ally.
Putin's spokesman has said there are no scheduled plans for Putin to meet Tillerson on Wednesday, but Russian media have cited unnamed sources as saying that such a meeting will happen.
Britain's Johnson, who had been due to visit Russian counterpart Sergey Lavrov in Moscow ahead of Monday's G-7 meeting, canceled the trip at the last minute, saying the chemical attack had "changed the situation fundamentally".
"Russia's behaviour is not consistent with the rules-based worldwide order", the G7 statement said.
In defending President Barack Obama's decision not to enforce his chemical weapons "red line" against Syria in 2013, Obama and other former officials repeatedly pointed to a U.S. -Russia agreement to remove Syrian stockpiles as proof that the president got results without resorting to a military response. But, he said, the distinction "doesn't much matter to the dead".
He says of the recent chemical attack: "We can not let this happen again".
Before heading to Russia, Tillerson told reporters that Moscow had either failed to take seriously its obligation to rid Syria of chemical weapons, or had been incompetent.
But the civil war in Syria is likely to dominate talks, with Italy hoping for a final communique that will reinforce United Nations' efforts to end six years of conflict.
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