Surveillance technology

Here is a link to the story about seeing through walls
http://hardware.slashdot.org/story/11/10/19/0333215/seeing-through-walls

Here is the van based one
http://www.bizjournals.com/boston/stories/2004/02/16/daily42.html?jst=b_ln_hl

There was some controversy about these being used in the US, but I didn't see those stories in my initial searches.