If a war started and we had to hide in bunkers (shelters), where not everyone would be allowed, but only those who could prove they would be useful, how would you prove yourself?)) There are two directions:
peaceful application and military, i.e., in peacetime, I could engage in construction and writing books :O, and in wartime, in reconnaissance and espionage)) And after that, you would have to pass a special obstacle course designed specifically for your "profession" :D.

