We boarded our Southtwest Flight 1979 on June 21, 2012 from Jackson, Mississippi which was already 20 minutes late. As we sat at the gate, a gasoline odor permeated the cabin. We deplaned because of a fuel spill on the tarmac. Southwest would not allow photos of the fire engines and the spill. Three Jackson Airport Authority officers blocked the airport window from the passengers view. The original departure time was 10 a.m. It is now 11:15 and we are reboarding. I took a few photos from inside the airplane. They will follow!