Yeah, that big black building? That has tons of windows but no label other than a number? That has least one, sometimes multiple police cars parked outside? Yeah, that's DARPA. It's the building kitty-corner from Nelson's apartment complex.
It'd dark now. I could probably give you a decent guess of how many people are working late, by the lit windows. Seven or eight? I can only see two sides of the building, so it's an imperfect science.
What? If the government could oh-so-easily be peering through your west-facing windows at any given moment, the only thing to do is surveil back. :p
Anyway. Sunsets are nice.