The MagRay essentially combines an X-ray and an MRI to differentiate between, say, a soda, and something more suspicious. Liquids are placed into the scanner, which, according to LANL researcher Larry Schultz, can give of a measure of how "sludgy" a liquid is, an indication of what might be inside the can or bottle. Another measure is X-ray density, or how difficult it is for X-rays to show through the liquid. With that data, the machine paints a fairly distinct portrait of the liquid, and a simple computer interface shows the most important information about the liquids in a giant colored circle: red for unsafe, green for safe, and more details presented alongside. The research is supported by the Department of Homeland Security, and it's easy to see how an airport security checkpoint in the future could employ a liquid-scanning device like the MagRay.