BBC News
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image captionHillary Clinton said the withdrawal of US troops from Afghanistan could lead to the "resumption of activities by terrorist groups"
Former US Secretary of State Hillary Clinton has warned of "huge consequences" of President Joe Biden's decision to withdraw American troops from Afghanistan.
Mrs Clinton told CNN there was a risk the Taliban - the Islamist group ousted in 2001 by the US-led invasion - could retake control.
The US aims to complete the withdrawal by 11 September.
However, the Taliban have been carrying out more attacks.
"This is what we call a wicked problem," Mrs Clinton told CNN. "There are consequences both foreseen and unintended of staying and of leaving," she said.