A Russian spy plane reportedly flew over Chicago on Aug. 13 at a high altitude, according to a local news report.
The plane, a Tupolev jet, departed from Dayton, Ohio, and went to Great Falls, Montana, as part of the Treaty on Open Skies program, WGN-TV reported. The treaty allows nations to carry out pre-arranged surveillance flights over each other’s territory.
“The treaty lays out standards for aircraft used for observation flights. Aircraft may be equipped with four types of sensors: optical panoramic and framing cameras, video cameras with real-time display, infra-red line-scanning devices, and sideways-looking synthetic aperture radar. For the first three full years after the treaty entered into force, the observation aircraft had to be equipped with at least a single panoramic camera or a pair of optical framing cameras. The states-parties may now agree on outfitting the observation planes with additional sensors,” says the Arms Control Association on its website about the treaty.