Seeing through walls

Cool and creepy. I love technology, but what unintended use will it be used for? [Link]

The U.S. military is getting better and better at spotting its enemies, when they're roaming around the streets. But once those foes duck into houses, they become a whole lot harder to spot. That's why Darpa, the Defense Department's way-out research arm, is looking to develop a suite of tools for "external sensing deep inside buildings." The ultimate goal of this Harnessing Infrastructure for Building Reconnaissance (HIBR) project: "reverse the adversaries' advantage of urban familiarity and sanctuary and provide U.S. Forces with complete above- and below-ground awareness."

By the end of the project, Darpa wants a set of technologies that can see into a 10-story building with a two-level basement in a "high-density urban block" -- and produce a kind of digital blueprint of the place. Using sensors mounted on backpacks, vehicles, or aircraft, the HIBR gear would, hopefully, be able to pick out every room, wall, stairway, and basement in the building -- as well as all of the "electrical, plumbing, and installation systems."