After 20 years and $2tn spent in Afghanistan, what was it all for?

Analysis: The stunning US defeat has left Afghans and Americans distraught and confused but some gains may not be easily erased

On 1 October 2001, three weeks after the 9/11 attacks and six days before the bombing of Afghanistan began, there was a small protest march in Washington.

The marchers wore badges saying Don't Turn Tragedy into War" and Our Grief Is Not a Cry for War", and argued that war was not the inevitable response to the terrorist outrage.