Great German police action for terror alarm

The German police have been extorted on a large scale in an investigation into possible conspiracy to carry out an attack on Stuttgart airport and possibly other airports.

Certainly one of the four would belong to a jihadist network. He would have gone to a Paris airport with a car with license plates from (the German city) Aachen. The four have been noticed on surveillance cameras at airports. For example, a father and a son from North Rhine-Westphalia took photographs of Paris-Charles-de-Gaulle airport and also ran suspiciously at Stuttgart airport.