including two small children. dozens of people are still missing. back here in the states, and to your money. a holiday travel alert now. as nearly 40 million americans take to the road for the fourth of july holiday, the secret service is warning about a surge in crime at the gas pump. from devices hidden inside the pump, to steal credit card numbers. abc's chief justice correspondent pierre thomas explains. >> reporter: watch here, as these men appear to be tampering with a gas pump. it only takes a few seconds, and just like that, they've installed a device called a skimmer. customers would never know it's there, but a skimmer is capable of siphoning off credit information and sending it wirelessly to fraudsters. and we're talking about thousands of customers being hit and millions of dollars being stolen? >> thousands every day. >> reporter: those criminals can use the information to produce thousands of counterfeit credit cards with stolen credit information. authorities say they've seen a recent surge in this type of fraud. this past weekend, the secret service fanned out across the