Backscatter at SFO?
I could've sworn that I went through a backscatter machine at SFO about three weeks ago. It was down at the far end of the United terminal, right at the connector to the Int'l Terminal. I was "randomly selected" to go through it then (didn't know any better) and am pretty sure it wasn't MMW.
I seemed to be cursed on this trip, as on the way back from Maui I got "randomly selected" for a pat-down, for no reason at all! Grr...