Yahoo Finance is not a brokerage firm so you won't be able to trade stocks through yahoo finance. Yahoo finance provides data of stocks but its not a trading platform. To do trades sign up for an account with online brokers such as TD Ameritrade, Etrade, or Scottrade.
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.