Some shoppers are on edge after a terrifying video showed a mob ransacking a California Nordstrom in broad daylight. Thirty masked thieves wreaked havoc, grabbing high-end clothing and bags at a Los Angeles mall. The mob was in and out of the store within minutes and stole $300,000 worth of items. Across the country cases of smash-and-grab robberies are causing devastating losses for retailers. It's estimated organized thefts have amounted to nearly $100 billion in losses in a single year.