Secretary of State John Kerry of the United States said, Sunday, "In the last 24 hours, we have learned through samples that were provided to the United States that have now been tested from first responders in east Damascus and hair samples and blood samples have tested positive for signatures of Sarin." Interviewed on the National Broadcasting Company's "Meet The Press", he continued, "So this case is building and this case will build."
Kerry said on the Cable News Network's "State of the Union" that the U.S. obtained the samples independently through an "appropriate chain of custody"," not the United Nations chemical weapons inspectors. He added, "We know that the regime ordered this attack, we know they prepared for it. We know where the rockets came from. We know where they landed. We know the damage that was done afterwards. We've seen the horrific scenes all over the social media, and we have evidence of it in other ways, and we know that the regime tried to cover up afterwards, so the case is really an overwhelming case."