After you investigate the smudges on the luggage (and get scissors thrown at you), ask the Coal Man about it, and then verify his alibi with the Porter. When you return to the luggage car, the French lady reporter will suggest that you disguise yourself as the Porter. Go to the Porter's room and put on the extra uniform (at least the hat).
Now Tesla will open the door for you.
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.