Can you play playstation 3 games or older on playstation 4?

No. There is a service called PlayStation Now that is a streaming service that will let you play select PS3 games on your PS4, Vita, PS3, or other compatible non-gaming Sony device. You can rent games and a choice-by-choice basis or get a subscription (I think $50 for 3 months?) to let you play all games as much as you want until the subscription ends.

See the PlayStation Now option in your PS4 menu for more information.

The Sony CEO guy, last name Yashida(?) said "Backwards compatiblity is very complicated and difficult to accomplish, I'm not saying we'll never do it for the PS4, but right now, no.

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.