Why do some documentaries use Kilometers instead of Miles?

In the US and the UK, distance is measured mainly in Miles. However, most other countries use Kilometer (the metric system) to measure distance. These documentaries were probably produced in countries where the metric system is the norm.

I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.