[mostlyundecided]

I found some pictures of Columbia someone took while it was in for service at Boeing in 2000, go to this site and scroll halfway down the page - and you can doubleclick the shuttle pictures for a closer look - one is of tiles being replaced on one of the wings.

[mostlyundecided]

Here is the picture of the Columbia wing being worked on at Boeing in 2000

[amom]

http://www.airlaw.com/bio-wolk.html

The expert just might have a vested interest in continuing this viewpoint?