Roughly a thousand people squeezed into a hall to see James Hansen talk this afternoon. They occupied all of the seats, then lined up along exterior walls. The aisles filled up with squatters, and dozens stood on tippy-toes outside trying to get a peak. At one point Mascone Center organizers forced dozens of people out, threatening to call the fire marshal and shut down the talk altogether. Then they gave up, allowing this intrepid reporter to sneak in.