Americans have not been a visible presence in the city for years, so the U.S. departure has not affected surface normality: Markets bustle and streets are jammed with homeward-bound civil servants by midafternoon. At night, the corner bakeries continue to be illuminated by a single bulb as vendors sell late into the evening. But beneath the surface there is unease as the Taliban creep steadily toward Kabul. “There’s no hope for the future,” said Zubair Ahmad, 23, who runs a grocery store on one of the Khair Khana neighborhood’s main boulevards. “Afghans are leaving the country. I don’t know whether I am going to be safe 10 minutes from now.” The government passport office has been jam-packed in recent days, filled with a jostling mob, even though visa options for Afghans are severely limited. Some of the humanitarian organizations on which the beleaguered citizenry depend said they would begin limiting the number of expatriate employees kept in the country, anticipating a worsening of the security climate.