Boris Johnson is right to convene the G7 leaders to discuss the Afghanistan debacle. While they are talking, diplomats and troops will be showing extraordinary fortitude in trying to fly thousands of people out before what started as a completely arbitrary deadline to leave next week. But the discussion will be painfully revealing of the scale and nature of the humiliation of the western world.
These powerful heads of government are reduced to discussing how they can keep an airport open with the tacit consent of the Taliban, who in turn might struggle to prevent an Isis or al-Qaeda attack. These leaders might be unable to honour the commitments they have made to thousands of Afghans to get them out. They will seek an international