Originally Posted by
GUWonder
That is not accurate for transits. There are also non-EU airports where transits take place without rescreening of all international transit passengers. Actually it is even possible via the US for some flights from CBP Preclearance-controlled areas outside of the US
Well precleared is obviously a corner case. But do they even rescreen AKL-LAX-LHR passengers at LAX?
IIRC there's no redundant security at SIN transit either. I suspect the majority of major hub airports outside the US and EU don't do security checks for transit passengers.