David, Overall great travel tour. I have two suggestions: In "Menlo Park Lab" a person coming out would have been preferable to a guy's back going in. I'm surprised you posted "equipment powering" since it's so out of focus.
Alan, I confess I was not focusing on art when I took those photos, so didn't pay much attention to people entering and leaving--I shot what was available at the time. The out of focus photo was included because, even imperfect, it had part of the story I thought needed to be said.