Every time a massacre happens, we say "never again". Now, "never again" is happening in Aleppo, as I write.

The government's operation to recapture the rebel-held eastern part of the city is in its final stages and reports of atrocities are coming in.

The Syrian army is reportedly going from house to house and executing residents on the spot. At least 82 civilians, including women and children, were shot on Monday, according to a spokesperson for the UN High Commissioner for Human Rights.