The horrors of Aleppo over the last few weeks cannot be overstated. It is an unimaginable hell with death lurking everywhere.

Multiple chlorine barrel bombs on 17 of the last 19 days have forced children out of cellars where they hide, into the open where they are shredded by bombs and mortars. Iranian militias are stalking the "liberated" streets and executing everybody they find; 82 on Tuesday, mainly women and children. There is no food, no water, no electricity and no hope.