TAMPA, Florida (CNN) -- Jason -- that's the name CNN was asked to call him -- slides a simulated explosive into an elastic back support. The mock bomb is as slim as a wallet; its fuse, the size of a cigarette. He wraps the support around his torso, and the bomb fits comfortably into the small of his back. It's hard to tell he's concealing anything; harder still when he dons a black T-shirt and a maroon golf shirt. Then, with CNN's cameras in tow, Jason heads to Tampa International Airport, where he'll try to sneak the fake explosive past...