CHICAGO— Caucasian shopper Bryce Glynn, 34, was waved through a beeping Walgreens security barrier Tuesday after the store's alarm system was activated by a CD purchased at a nearby Sam Goody. "Go ahead," said cashier Maria Ordonez with a casual waving motion. "You're fine." As Glynn volunteered to open his shopping bag to show its contents, the security guard at the store's entrance declined the offer, insisting that he exit unchecked.