Originally Posted by
CO 1E
I was just in Frankfurt and, yes, the double security checks still exist (once just after passport control and once just before the CO gate area). No concessions past the second checkpoint and no liquids, etc. permitted past the second checkpoint, even liquids purchased past the first security checkpoint.

That's true for most US-bound flights from international airports since 8/11 of last year. Nothing special about CO or FRA here.
But with Europe adopting the 100mL/Ziplock rules on 4/17, those secondary checkpoints may cease to exist. We will find out in about 3 weeks. Many major Asian airports are also adopting, or have just adopted, the same.