“A few months after Russia began its full-scale invasion of Ukraine in 2022, satellite imagery captured unusual activity at a restricted military research facility nestled among the birch forests northeast of Moscow,” the Washington Post reports. “The Russian site, called Sergiev Posad-6, had been quiet for decades, but it had a notorious Cold War past: It had once been a major research center for biological weapons, with a history of experiments with the viruses that cause smallpox, Ebola and hemorrhagic fevers.” “Satellite imagery over the next two years — collected by Google Earth and commercial imaging firms MAXAR and Planet Labs — shows construction vehicles renovating the old Soviet-era laboratory and breaking ground on 10 new buildings, totaling more than 250,000 square feet, with several of them bearing hallmarks of biological labs designed to handle extremely dangerous pathogens.”