In case you missed it from /.
< WarCloning, the New WarDriving? - Slashdot >
Cloning passport card RFIDs in bulk for under $250
< - YouTube >
Ethical hacker Chris Paget demonstrates a low-cost mobile device that
surreptitiously reads and clones RFID tags embedded in United States
passport cards and enhanced drivers’ licenses.
Mentions of GNU Radio and Ettus are at 4:43 - 4:47.