Wino I haven't got a clue what your talking about.
"Suppose after the plane was in the air 30 min or 60 min the final comparisons come back through the computer"
Why should it be the case that they can only find full information about a passenger after the flight has taken off.
A credit check is done by computer in a store to make sure your credit worthy, while you wait. How come this isn't possible with data relating to terrorism.
The whole basis of flight screening and intelligence information is obviously just a
PR exercise and in no way is going to contribute to flight safety if it can only be used after the flight has departed.