There is nothing wrong with their bitmap strategy. Just change the 'size' parameter based on the screen density.
The short answer to your question is, use density resources. If you are using a high density screen, but your bitmap in.
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.