Aleppo did not fall. It was liberated from the rebel/terrorist groups that occupied it. 

Hopefully the horror is now over for the civilians that live there. I condemn the rebel groups, the terrorists, the United States and the UN for rejecting cease-fire agreements proposed by the Syrian/Russian forces. Countless civilian lives would've been saved if the rebels had allowed civilians to flee from its territory. Instead they used the civilians as human shields, with the eager backing of the United States and its allies. You won't find a more cynical abuse of civilian lives than what we saw here.