the united states and am in the global entry program between swiping my passport, getting my picture taken, doing my fingerprinting, answering a few questions on this machine, and getting my bag and getting out, the process could only take a few minutes. what i avoid are the lines at regular customs. >> ed blum just flew in from panama. >> i travel frequently for business and i stand in line an hour. now it takes about two minutes. >> experts like former top israeli airport security official rafi says there's no substitute for an alert human screener looking for suspicious body language. >> there's a lot involved in identifying suspicious behavior. some of it is uncontrolled behavior as a result of the stress the terrorists are under. while they're on a mission. that is something that machines have great difficult to detect. >> ron also points out a machine won't detect a terrorist who has no previous criminal record and