Wolfrum hates Diet Pepsi more than you hate anything.
If you haven't tasted Caffeine-Free Diet Pepsi, but would like an idea of what it tastes like, do this – keep a straw in your pocket and wander around outside until you find a pigeon or squirrel that's been dead for, oh, say three months. Stick the straw into the dead animal and suck. Caffeine-Free Diet Pepsi tastes like that, except worse. Plus, the taste lingers in your mouth for months. And gradually gets worse until it's like your mouth was invaded by the notoriously rare and deadly Asian Shit Ant.
What gets me is that they had high-paid executives sitting around a table, drinking this dreck and all nodding approvingly, "Oh yes, this is what America wants, a 'light, crisp, refreshing' beverage that tastes like Cheney sputum."
You want to defeat terrorists? Force them to drink Caffeine-Free Diet Pepsi. I'm sure it would violate the Geneva Conventions, but they'd immediately tell you anything they knew, then hang themselves. Caffeine-Free Diet Pepsi is torture in a 12-oz can.