They are trained from a very young age to become a guide dog, it's very rare if not impossible for an adult dog to become a guide dog as the training is pretty intensive They're trained at schools from puppyhood before eventually 'graduating' to become guide dogs.
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.