Joe Biden and Boris Johnson are haggling about the deadline for the end of the rescue mission from Kabul airport. Biden wants to stop at the end of the month, while Johnson wants to gain a few more days with a target of the UK getting at least 6,000 civilians out of the Afghan capital.

The argument about the end date is a glaring example of the thinness of military planning as supervised, or not, by the politicians in both Britain and America.