big. with that being said, with the bear metric pressure devices, that airport is equipped with barometric testing devices for bags. so it would have -- if that was the case, which could very well have been, it would have had to have been put on in some other way so it's not part of the baggage system at least. >> this bag was flying from a popular tourist destination. is it possible someone on the ground could have tampered with the plane, someone who could have had access to the plane, mechanic or otherwise? >> right. it could have been tampering on the ground, in bags, could have been put on by anyone working at the airport on the planes. even in the best of security it could have been a timer switch. >> and bob, would we have the ability to figure out what happened if this did happen?