The exception message means that someone is trying to call a method named outlet1 that has no argument (note the missing colon) while your method's signature is outlet1: . You have probably missed the colon of the selector when adding the target/action to your button.
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.