If you Macbook only plays SOME DVD's then it's likely that the laser lens on your DVD drive is dirty. Try a laser lens cleaner disc in the DVD drive. These can be purchased at most computer electronics stores and some superstores.Be certain that the discs are you playing display the DVD Video logo or verify that they also work in a set top DVD player.
Some discs may be dirty or scratched and need to be cleaned or replaced. Some computer recorded DVD-R type discs might not have been recorded in the correct format to work as a DVD Video disc in all computers or players.
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.