It looked like a harmless flashlight, but TSA found a knife hidden inside. During screening at Tampa International Airport, an officer flagged the unusual item after its makeup and composition stood out on the X-ray. Then comes the reveal: a 4-inch, double-edged knife integrated into the flashlight's handle. TSA says the passenger initially claimed he didn't know the item was in his bag, but later told police he'd put it beneath the lining to save space. He has been arrested and not allowed to travel. See how TSA officers uncovered it and what an airport security expert says about concealed blades: