As I was writing about WBI machines this morning it occurred to me that there is a lack of understanding around the data aspects of whole body imaging. I'm not an IT guy, but know a lot of you work in that field. Would you help us all understand? Here's my line of thinking:

* We already know TSA was lying about the machines not being able to store or send data
* You can't create an image without some sort of file being created, right? Even when I open a pdf email attachment there is a file created (Temporary Internet Files for Windows users). When Comrade Janet talks about "erasing" the image - you can't erase something that doesn't exist. So a file IS created. How is it being erased? Just trashed/recycled or actually over-written?

Which leads to the following questions:

* What is the storage capability on these machines? Is it so small that every new image over-writes that last one? Or enough to hold a day's, week's or month's worth of images?
* Who has access and control over retrieving these images?

Would love a technical perspective on this.