Unlikely Heroes? Pick a historical figure whose actions you've always questioned or hated. I'd rather it be someone who you had an emotional reaction to, but anyone whose actions you've questioned will do. Idi Amin, James Earl Ray, Judas, Nero, Adolf Hitler... the list goes on. Anyway, do a little research and see if you can think of a story that would justify their actions to you. Go as sci-fi as you want, but make them have a reason.
So what do you think?