The Cipher Brief Open Source Report for Monday, August 23, 2021

In this episode: The Taliban won't agree to foreign troops in Afghanistan beyond August 31 while Biden says the US may in fact extend the deadline, setting the stage for heightened tensions. Security at the Kabul airport continues to deteriorate. Taiwan warns that China is seeking to emulate the Taliban while committing that it can defend itself and VP Harris kicks off a south Asian tour in Singapore.