Secretary of State John Kerry reiterated his call on Thursday for Russia and Syrian dictator Bashar Assad to stop attacking rebels in Aleppo, even after Syria has consistently ignored those plans and was on the verge of kicking out the rebels.

“The only remaining question is whether the Syrian regime with Russia’s support is willing to go to Geneva prepared to negotiate constructively and whether or not they’re willing to stop this slaughter of their own people,” Kerry said at the State Department.