Watched it over Southern California as well. Nice sight to see, extremely fast. Not sure which one came first, but the first one I saw was moving extremely fast heading N NW, I figured this to be the Atlantis. The second was, I'm assuming, the ISS, which started about 20 degrees above the W NW horizon and traveled in a S SE direction until it faded out. Also, while waiting to see the second sighting, we saw a shooting star as well. The moon was amazing until it dipped below the mountains on the horizon here in the valley.