You do realize that California *is* a right-to-work state, don't you?
Not according to a search for "right to work california".
You do realize that California *is* a right-to-work state, don't you?
It's a temporary/popup datacenter. If you look at the closeup of it, you'll notice you've got one main (Rather temporary looking) building, and shipping containers along the side of it. Each of those shipping containers is kitted out a a mini datacenter.
The trailer parked up behind those, will likely be the backup generator for the temporary server farm.
They are fairly common now, however really shouldnt be used for something as important/mission critical as iCloud IMO. I've seen a few providers resort to using these only to have it all go tits up when anything happened weather wise.
I guess it's all down to how well built they are. Quite a few companies make and use these now. HP, IBM, Sun, Google, Cisco, Toshiba to name a few.
Sun provide a bunch of great videos showing their 'Project Blackbox' datacenter in a shipping container: http://www.youtube.com/watch?v=svLdboZdfQ0