Two large Sunni Arab urban centres - East Aleppo in Syria and Mosul in Iraq - are being besieged by pro-government forces strongly supported by foreign airpower. Yet the coverage is very different. In Libya ... opposition activists were able to gain control of the media narrative. The overthrow of Gaddafi rapidly reduced Libya to a violent and criminalised anarchy with little likelihood of recovery. In present day Syria and Iraq one can see much the same process at work. In East Aleppo, some 250,000 civilians and 8,000 insurgents, are under attack by the Syrian Army ... supported by the Russian and Syrian air forces. The bombing of East Aleppo has rightly caused worldwide revulsion and condemnation. But look at how differently the international media is treating a similar situation in Mosul, 300 miles east of Aleppo, where one million people and an estimated 5,000 Isis fighters are being encircled by the Iraqi army ... with massive support from a US-led air campaign. In the case of Mosul, unlike Aleppo, the defenders are to blame for endangering civilians by using them as human shields and preventing them leaving. The extreme bias shown in foreign media coverage of similar events in Iraq and Syria will be a rewarding subject for PhDs students looking at the uses and abuses of propaganda down the ages. Nothing much has changed since 2003 when the Iraqi opposition to Saddam Hussein had persuaded foreign governments and media alike that the invading American and British armies would be greeted with rapture by the Iraqi people.