You know what tom I just found that they have the radio transmissions that were given while the pictures were taken so here is what Buzz Aldrin had to say about this picture: "Aldrin: (Going east of the strut) I'll get a picture of the plus-Y strut taken from near the descent stage, and I think we'll be able to see a little bit better what the thermal effects are. Seem to be quite minimal. (Long Pause, then turning to look under the spacecraft) There's one picture taken (pause) in the right rear of the spacecraft looking at the skirt of the descent stage, shows a slight darkening of the surface color, a rather minimal amount of radiating or etching away or erosion of the surface. On descent, both of us remarked that we could see a large amount of very fine dust particles moving out. (Pause) It was reported beforehand that we would probably see an outgassing from the surface after actual engine shutdown, but as I recall, I was unable to verify that. (Long Pause)"