It's a good thing Zuko asked him to sit down because Iroh isn't sure what to do with all the information he's been given. He folds his hands and stares intently at the floor while he tries to process all of this.

A President was elected by the people after the council was dissolved. That President is currently missing and his grandfather is currently serving as a stand-in leader. The Avatar opened the spirit portals permanently, allowing spirits to live alongside humans, which explains the vines everywhere. People are going missing and showing up in Republic City.

As he ticks off each item on a mental checklist, Iroh finally looks up again. "I see," The reply isn't exactly a good one, but he doesn't look as troubled as he did when he first arrived. "What can I do to help? What are the United Forces doing right now?" He'd rather not have to chose between his job and his grandfather, but he's assuming Zuko knows what to do better than any of his colleagues.