Did you know that when you buy an airline ticket and make other travel reservations, the federal government keeps a record of the details in a file called Passenger Name Record or PNR? If airlines don't comply, they can't fly in the U.S., explains Ed Hasbrouck, a privacy expert with the Identity Project who has studied the records for years and is considered the nation's top expert. Before each trip, the system creates a travel score for you, generated by your PNR. Before an airline can issue you a boarding pass, the system must approve your passage, Hasbrouck explains. That's one way people on the No Fly List are targeted. The idea behind extensive use of PNRs, he says, is not necessarily to watch known suspects but to find new ones. Want to appeal the process? It's a secret administrative process based on the score you don't know, based on files you haven't seen," Hasbrouck says. The program collects seemingly trivial details. If you have an argument with an airline gate agent and that agent enters a notation ... that record stays in your PNR. "The U.S. government is getting the data and sharing it in ways we don't fully know about with other governments," Hasbrouck says. The information collected by the airlines is shared with third-party data companies who store it. Where? In the cloud. Make you feel safer? In Canada and the European Union, the collection of this information spurred public debate. But not here.