*its*
Please, editors.

Imagine you just bought a 26 year old car that had a few million miles on it, and then were told this is its final million-mile journey, but you *will* die in a ball of flame if it breaks down on the road.*  That's how bad-ass NASA astronauts are. *I'm far too lazy to calculate how many miles they've actually gone at 17,500 miles/hour.