Originally Posted by
cigarman
There is secondary RANDOM searches at the second check.
Yep. The screeners at the gate have sheets telling them they must search xx% of pax on the aircraft. Something like 10% or so, IIRC. This is in addition to the BP and passport check.
Dunno if they confiscate water. That would be stupid, since the person could just hand it to one of the non-screened passengers.