We reported months ago about the new $350,000 three-dimensional carry-on luggage scanners. Here’s what the COBRA machines “see” and here’s a story from Cleveland that reveals a little more about what they do. The story says these scanners - similar to CAT medical scanners - will allow travelers to leave liquids and electronics in their carryons for screening, thus speeding up the security process. I’m doubting the TSA will modifiy their practices much even when these machines are in use.