KABUL, Afghanistan — The traders crouched beneath the walls of an old fort, hunkered down with the sheep and goats as they talked, eyes nervously flitting up from time to time at the blimp that has become their constant overseer.
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The dirigible, a white 117-foot-long surveillance balloon called an aerostat by the military, and scores more like it at almost every military base in the country, have become constant features of the skies over Kabul and Kandahar, and anywhere else American troops are concentrated or interested in.
Shimmering more than 1,500 feet up in the daytime haze, or each visible as a single light blinking at night, the balloons, with infrared and color video cameras, are central players in the American military’s shift toward using technology for surveillance and intelligence.