Secretary of State John Kerry is “absolutely certain” that Syrian Bashar al-Assad’s regime has launched chlorine attacks on its own people is currently compiling evidence to support it, he told reporters Tuesday.
“I am absolutely certain, we are certain that the preponderance of those attacks have been carried out by the regime,” Kerry said Tuesday during a surprise appearance at the State Department’s daily press briefing.
“It has been significantly documented; it’s dropped from airplane,” he said.
 “And you can go through a certain sort of tracking of the delivery system and delivery approach. It’s frankly not that hard to pin down in the end, and that’s some of what we will lay out at the appropriate time.”
Kerry added that he’s discussed the findings with Russian Foreign Minister Sergei Lavrov and, while he’s confident the Russians will raise the issue with Syria again, patience is “wearing thin” over the “extraordinary depravity” of the weapons Assad is allegedly using against his own people.
“We are not simply sitting there and allowing this to happen without any efforts to see if there is a way to stop it,” Kerry said. “Thus far, it has not been stopped and it is only increasing the international community’s anger at the Assad regime.”