Roberts estimates that 60% of the roof is covered with solar panels.
Major construction and landscaping is happening inside the ring.
The auditorium, where Apple will reveal new products like next year's iPhone, is almost complete.
Cars are driving and parking in the new parking lot.
next slide will load in 15 secondsSkip AdSkip AdThe atrium should be stunning when it's done.
But right now, the outside has lots of standing water and mud.
Watch the entire drone flyover video below: