http://www.usatoday.com/news/nation/...-30-xray_N.htm

"Advanced technology X-ray machines photograph bags from two angles instead of one and show the images on side-by-side screens.

The added view could ease the TSA requirement that laptops go through X-ray machines in bins with no other items, said Peter Kant, a vice president at Rapiscan Systems, which makes the machines.

Laptops have been a security concern because their casings and circuitry are dense and could be used to shield weapons from the current X-ray machines, which take a single photograph from underneath an object. The new machines, by taking a second photo from the side, would reveal a weapon on top of a laptop, Kant said."