| Photos of the Colossal Duga-3 Radar System Built by the Soviet Union |
| Photos of the Colossal Duga-3 Radar System Built by the Soviet Union https://petapixel.com/2015/05/06/photos-of-the-colossal-duga-3-radar-system-built-by-the-soviet-union/?utm_source=amateur-radio-weekly&utm_medium=email&utm_campaign=newsletter PetaPixel |