How do the machines locate Zion?
We goofed on this one. A number of you (Joseph Guendert being the first) wrote in to remind us that the machines have destroyed Zion five times already (see answers further down if you don’t know what I’m talking about), so duh, they have to know where Zion is. Taking it a step further, the machines actually set Zion up each time with help from the One, so they pick the location in the first place.
