An Aerostar high-altitude balloon as seen from the ground in Tucson. Photo by Dugan Meyer
The U.S. Army and a private company are flying high-altitude surveillance balloons over the Tucson area, raising concerns among privacy advocates.
Multiple high-altitude balloons have been spotted over the Tucson and Sierra Vista area for more than a week, with one balloon in particular staying over the area longer than any of the others. That balloon, with the registration number N257TH, has made headlines in the past…