Looking in all the wrong places (Score 1)

"Absence of evidence is not evidence of absence"

I'm not surprised that these folks didn't find anything, considering the sheer volume of images that's being transferred on the net each day.

Perhaps they were looking in all the wrong places to begin with. I would assume that if these terrorists use steganography to transmit messages, they would do so via a few selected channels. Perhaps they simply use e-mail to send the images, or some obscure binaries newsgroup.