I wonder if we can see Mark Zuckerberg learning to fly here, or perhaps to skydive? A lot of recent flights that start in one city, fly to Tahoe, don't stop, but do a big turn around there, then go back home. Or which otherwise go way out of the way to do a short loop around Tahoe then land at a destination, and one a few months back that seemingly just circled there for a while.<p>Or... maybe he's taking aerial photography -- always watching! /s