The world is riveted as the mystery of Flight 370 deepens.
It has emerged that two of the passengers were using stolen passports. Passengers have to show their passport before they get on any international flight originating in the U.S.A., and the documents are carefully screened. But at many airports around the world, the passports are never cross-checked to determine if they've been stolen.
Aviation security expert Jeff Price told INSIDE EDITION, "I have been to some countries where they barely even glance at your passport, just to see if you have one, much less, if its actually yours.
Price said, "People travel on fraudulent documents all the time for a lot of different reasons other than terrorism. Usually, it is other types of criminal activity."
Meanwhile, the search continues for the plane that has simply vanished.