"Red Flag": US Air Force is preparing for a military conflict in which the satellite navigation system is unavailable. GPS is operated by the US Department of Defense and currently has 31 satellites in orbit. Now, training missions must be carried out without the familiar system. The exercise, which runs until 16^th of February, will also have an impact on the civilian population.

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Picture: © APA/AFP/US AIR FORCE/KAMAILE CASILLAS