This is a live demonstration of how, with easily obtainable equipment, your credit card number can be lifted from your wallet without ever having a thief touch it.
Hundreds of millions of new credit cards, debit cards, ID cards, passports, transit cards, and others are now being embedded with a tiny two way radio chip called RFID that is supposed to make the cards easier to use. The benefits are yet to be realized, but the radio chip has made it easier for electronic thieves to steal from you.