Earlier this month, 26 youths walked into a local gas station and started pulling items from the shelves. Then, they walked right out. The clerk was too frightened - and shocked - to move. It's a form of stealing called "swarming." And Metro police say it not just shoplifting - it's a felony. Is it spreading in Las Vegas? How can store owners guard against it? The Las Vegas Metro Police Department tells us about swarming, and what you can do if it happens to your business.