So why has it been so difficult for TSA to figure out that the likelihood is extremely remote that a passenger profile of a U.S. citizen and frequent flier with no criminal history would be a terrorist?

FORBES: For Some Fliers TSA Security Lines Just Got Much Shorter

The data is then analysed to produce a schematic read-out for immigration officials that shows the risk profile for every single passenger on an incoming flight, seat by seat, high risk to low risk.

BBC: Risk profiling software tackles the terrorist threat

Right now the FAA and airlines rely on random screening and computer-assisted passenger screening to decide which bags should be screened, based on a profile of suspicious behavior.

CNN: Congress mulls tightened security for checked baggage