Anything really. Just be polite/respectful and leave your politics at the door. I assume most questions are going to come from people who are considering joining the military, but I welcome questions from people who are active duty, reservist, or civilian. I might not have the answer to your specific question, but if it’s military related, I can find someone who does. The blog is all about developing a community where people can ask questions and get the answers they need, so go ahead and fire away.