Ahmad Mukhtar has been a CBS News producer and reporter in Afghanistan since 2009. He is currently based outside the country.In early May, I stood on the rooftop of Kabul's Serena hotel discussing with colleagues how soon the Taliban might arrive in the Afghan capital. I was optimistic that ongoing peace talks in Qatar would produce a result. In the worst-case scenario of a complete American withdrawal, most people, including myself, believed it would still take the Taliban a few years to overrun Kabul.  By early August,  I was less optimistic. I told a colleague that the collapse...…Ahmad Mukhtar has been a CBS News producer and reporter in Afghanistan since 2009. He is currently based outside the country.In early May, I stood on the rooftop of Kabul's Serena hotel discussing with colleagues how soon the Taliban might arrive in the Afghan capital. I was optimistic that ongoing peace talks in Qatar would produce a result. In the worst-case scenario of a complete American withdrawal, most people, including myself, believed it would still take the Taliban a few years to overrun Kabul.  By early August,  I was less optimistic. I told a colleague that the collapse...WW…