Man. I mean, my world just had a huge war, too, 70 years ago. But it didn't even come close to wiping out all the people! That's terrible. Sounds like you're doing a lot of good out there, though.

[Oho, what better way to answer that to give a demonstration. Korra smirks before taking a few paces back, making sure there's plenty of room for the mirror to take it in. Then she drives her foot to the earth, causing a slab of rock to shoot up, and with a stiff punch sends it hurtling through the air. She follows this up quickly with a high kick, trailing fire as it swoops back towards the ground.]

Like that.