The US has deployed extra military resources to protect American and coalition forces withdrawing from Afghanistan.
Heavy bombers and fighters jets will be deployed to safeguard troops and civilian contractors.
US President Joe Biden has set the withdrawal deadline for 11 September- the 20th anniversary of the 9/11 attacks that sparked the war. However, the withdrawal comes amid escalating violence with Afghan security forces on high alert for reprisal attacks.
The Taliban have warned that they are no longer bound by any agreement not to target international troops.