This explains everything...
In the enhanced photo of the first debate, Nelson says, look at the horizontal white line in middle of the president's back. You'll see a shadow. "That's telling me there's definitely a bulge," he says. "In fact, it's how we measure the depths of the craters on the moon or on Mars. We look at the angle of the light and the length of shadow they leave. In this case, that's clearly a crater that's under the horizontal line -- it's clearly a rim of a bulge protruding upward, one due to forces pushing it up from beneath."
The Time Vault: Bush wore a device during debate according to NASA
