[Aang can't even imagine something that would get him to truly turn away from Katara. Hearing about that year in another place only makes him confused and concerned. Whatever happened, he knows it can't have been easy to be separated from her home.

It does take him a moment to get what she means by her question. He blinks and then he goes on thoughtfully.]

Well... the things about home is... It's that the war's over. I did it, Katara. I beat the fire lord and took his bending away. Then I saw Sokka and Toph and Suki again, and Sokka called him the loser lord... [He pauses and scrunches up his face in thought.]

I don't think I remember much after that.