>> reporter: we're here in long beach, california, about a hundred of these containers looked at every single day. one of these cargo containers comes into the port of los angeles about every six seconds. >> so they appear to be the real thing, but they're knockoffs as well. >> reporter: every day thousands of boxes arrive filled with items that may look harmless are r but -- >> perhaps it works for a few weeks, perhaps it catches fire and burns the house down. >> reporter: more than a billion dollars in counterfeits are seized by customs and border protections annually -- >> this shipment was -- >> reporter: as federal agents crack down on what some here call the crime of the century. >> you you can buy anything that appears to be legitimate. you the think you're getting the real product at a discounted price only find out it's a counterfeit. >> reporter: nobody knows fakes like craig crosby. >> everyday items that they're purchasing are counterfeit. >> reporter: can you spot the legit product? the real is on the left, the fake on the right. >> you're going to be very