Over the weekend a company called Strava, a social network for people who want to track their workouts, updated an online map showing the routes of 1 billion workouts in 2017.
But in doing so, it seems to have exposed secret US military bases in Turkey, Syria, and Yemen.
Strava drew on data from devices like Fitbits or smartphones that people use to track workouts such as runs or bike rides. But fitness-tracker users skew Western, young, and active. In countries like Niger, the heat map appears to highlight the activity of US troops on military bases keeping fit.
The result is potentially damning for the US military’s operational security.