[tooltalk]

Apple isn't probably thinking about doing this themselves. Note that Cook is going to "support," not actually build themselves.

They are most likely to invest in Foxconn to help them open up shops in the US.

[PatrickAuld]

Definitely possible, Apple uses vendors in a way that would be difficult to do themselves. However, if I'm right about the types of jobs this will create it does fall in line with Apple's expertise more than a human built process. Just as they are building their own silicon they may want to own pieces of build process.