I have much easier solution for you - it is simple! Just add this command at the very start of the php source.
Before sending any thing to view (text in the browser). Check if your model that if id is valid or not . If id is not valid redirect to your error page.
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.