On June 6, 1966, a group of US Army investigators discreetly broke dozens of glass vials on the New York subway linesk. Each of them contained 175 grams of a bacteria called Bacillus subtilis; that is to say, 87 billion microorganisms per blister. Their mission was simple: smash the glass containers in places that would facilitate the spread of the bacteria.
Later, another group of researchers equipped with machinery to analyze the air would be in charge of seeing how, when and how much the microorganism was able to spread through the bowels of New York City. It was not the first time that the US Army did something like this and it would not be the last. During the decades, from 1949 to 1969, the country’s largest subway network became the world’s largest bacteriological warfare laboratory. Without anyone knowing.