Technical expert weighs in on "mystery bulge"

From Salon (required free day pass -- worth sitting through to see the photos)

"There's no question about it. It's a pretty obvious one -- larger than most because it probably has descrambling capability," said Alex Darbut, technical and business development vice president for Resistance Technology in Arden Hills, Minn. Darbut examined photographs of the president's back taken from the Fox News video feed at the first presidential debate in Coral Gables, Fla., as well as 2002 photos of the president driving and working in a T-shirt on his Crawford ranch, which were posted on the White House Web site.

Darbut speculates that the device the president wears is provided by the Secret Service, noting, "They're not going to have him driving around the countryside on his ranch without being in instant contact with him."