The Bush Bulge

At Crawford, Brush capital of Texas
Look at Bush's back in the above photo circa 2002. What is he wearing under his shirt ? During the election debates pictures showed him wearing something like this under his suit, but we could never find out if it was a transmitter-receiver, a brace correcting some unfortunate deformity, or part of a bullet proof vest. The RNC pretended it didn't exist; they can be a little secretive, just like their Prez.