There are a lot of examples. Afghan society is generally willing to sacrifice individuals for their tribe, so it's not that hard to understand.

Example: Kandahar, Marines under MajGen Mattis, late Dec 2001/Early Jan 2002. ODA 574 enroute from Tarin Kowt, Dec 2001.

For a more recent example: http://abcnews.go.com/WN/Afghanistan/special-forces-apologiz...