How about a historical subject people might feel strongly about? I really love history, esp. military history. I want to go into aerospace. My essay is about a mock trial we had in AP History about the atomic bombs in WWII, how initially I thought they were necessary but then changed my mind after being basically forced to be the lead prosecuting attorney by my teacher and then winning the trial hands down. Is that too controversial? I think it shows an open mind but maybe I’m wrong.