[Hulka]

That is interesting, as all my international travels for decades and never experienced an aiport situation like that.

[SeeSac]

This illustration is helpful. See Item 6 below the diagram.

6: Security Check - A security recheck is necessary because passengers are still in a secure area and have had access to their bags. Connecting passengers do not have to pass through any additional security beyond this point.

http://www.cvgairport.com/terminals/abroad.html