A bomb scare paralyzed a Wal-Mart in Kemah for more than four hours Saturday, after authorities locked down the store with dozens of customers and employees inside as they apprehended an armed man with suspicious devices attached to his body in the parking lot. Anxious friends and family waited across the street from the store in the 200 block of Deke Slayton Highway, which was locked down around 10 a.m.