It's the report much of the Western world has been waiting for. But it was far from a slam dunk.
"Chemical weapons were used on a relatively large scale in the Ghouta area of Damascus on August 21st, causing numerous casualties, particularly among civilians. This is the most significant, confirmed use of chemical weapons against civilians since Sadam Hussein used them in Halabja in 1988, the worst use of weapons of mass destruction in the 21st century," U.N. Secretary General Ban Ki-Moon said.
According to the report, 85 percent of the blood samples taken by the UN's investigators tested positive for sarin.
Ban stopped short of assigning blame for the attack but did add:
"Do not slaughter your people with gas," he added.
The report came on a day filled with general agreements between the U.S. and Russia . First ... Syria must hand over its chemical weapons.
But when and how that should happen is a matter of debate.
The U.S. is calling for a complete and immediate handover of chemical weapons --- a point which prompted this response from Russian Foreign Minister Sergei Lavrov.
"As for the statements made by our partners, saying that a resolution on Chapter VII has to be adopted as quickly as by the end of the week, well, this, first of all, shows lack of understanding of what John Kerry and I agreed upon," Lavrov said.
The U.S., along with the UK and France say they plan to seek binding deadlines for chemical weapons removal in a UN resolution this week.