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 of one provincial capital would likely lead to a takeover of Kabul. But I didn't expect it to happen so fast. The Taliban seized...…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 of one provincial capital would likely lead to a takeover of Kabul. But I didn't expect it to happen so fast. The Taliban seized...WW…