I am aware of his condition, but awareness is not something that should be stifled for the majority just for the sake of a minority. Whether it might trigger him/her or not, that is a risk worth taking when the suicide rate, especially among military personnel, continues to rise. As I said before, pretending bad things don't happen and avoiding the topic for the sake of sparing one person's feelings only helps to ensure that bad thing keeps happening, whatever it may be.