Ah, so this is what Amestris is like through this door. A bit boring without the homunculi attempting to destroy the world around them.
Greetings, people of...wherever you're all from! I'm Roy Mustang, your friendly neighborhood firestarter, so to speak. From what I've gathered, alchemy doesn't exist on the other side of this door, though I'd be tempted to make the poor boy who I walk around with check that out in the local library. I doubt he'd gain access to a military library, though. That's where all the good secrets are hidden.