In article .com,
wrote:

When I first saw this hole, a chill went down my spine

see pictures: http://images.google.com/images?q=pentagon%20hole

because I knew it was not possible to have a reinforced concrete wall
fail in this manner, it should have caved in, in some fashion.

Unless, as the contractors have already told the world, that hole was
punched out by a backhoe after the impact.

http://www.rense.com/general63/pmm.htm

This was through one of the links from your URL above.