Kunduz bombing: What the US 'mistake' admission tells us
6 October 2015 Last updated at 23:25 BST
The US commander of international forces in Afghanistan has conceded that the airstrike on a hospital in Kunduz was a mistake.
Twenty-two people were killed including staff from Doctors Without Borders, which ran the hospital.
Gen John Campbell was speaking at a US Senate hearing on American involvement in Afghanistan.
The BBC's Nick Bryant was following Tuesday's proceedings.