"The president's feet are not to touch the dirt."
Here's a pic via Counterspin Central:

What's that penned in on the side there giving Bush a wide berth--livestock? Oh, hah, no! That's the military! I wonder if they're allowed to get dirt on their shoes?
Bush is such a Macho Man, man! Tough guys don't walk on grass! Uh, except for the tough men and women actually doing the fighting and dying for the Carlyle Group--I mean, "Operation Iraqi Freedom"--they can walk on the grass, penned in at a safe distance from the King. Tough Kings Don't Walk On Grass!