Complex

An artifact of the military/industrial complex at Hunters Point. My friend who worked for Lockheed Martin tells me that structure is a missile catcher that was used for test launches. I can't tell if he is joking.
I was on my way out for the opening night of the San Francisco Symphony season, when I got an automated message that the concert was cancelled because the chorus are on strike. So I stopped off at Candlestick Park and took this, before heading home again.

Edit  - He wasn't joking, apparently SF Chronicle Article