If Earth became one nation, where should the capital be?

ParanoidObsessive posted...

Are we talking SHIELD helicarrier or like a giant blimp? Or like a massive platform help up by multiple balloons?

Or are we going all-in on something like Columbia from Bioshock?

I'm thinking balloon platform. A giant blimp would be too small, and the helicarrier idea is too energy-intensive.