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Activated. the stress fackture, the south africature area is five feet by one foot wide. where the skin comes together, on the aircraft, it doesn't just come together like this. it's overlaps. that is called a "lab joint." and at each joint there are three rows of rivets. that run down the aircraft longitudinally. and we have clear evidence that the skin separated at the lower rivet line. a preliminary on-site examination reveals preexisting fatigue along the entire fracture surface. this is a term known in the industry as multisite damage.

>> two part question. as a result of the grounding of southwest airlines airplanes yesterday did they find anything else and i am not aware of any additional information -- any additional problems that southwest has found. however, again, being that they are a party to the investigation we would expect that if they are getting information that they would be feeding that back to us. and the second part of the question was on this -- on the accident airplane have we found any additional areas of fatigue cracking. we will go and look at the areas adjacent to this particular fracture surface. we w...

The cabin holding passengers, opened up and exposed them to the clear blue sky and the need for oxygen. >> preliminary on sight examination reveals preexisting fatigue along the entire fracture surface. >> harris: serious injuries to the flight attendants and passengers and people were fainting from the lack of cabin pressure. they didn't make it to a commercial runway, they had to touch down at a marine air station. fox report is live with our casey stegall. casey. >> reporter: yeah, harris, the southwest airlines jet in question behind me over my shoulder. we are extremely close, ab that is ...