Originally Posted by
Austin787
Any international flight to the US can be subjected to security screening at the gate. Not limited to Asia airports - I have also seen gate screenings at Europe airports. Methods vary - sometimes full screening, other times only search carry on bags; sometimes everyone is searched, sometimes people are randomly selected, and sometimes no gate screening. Regardless of how screening is done, any liquids over 3 ounces are confiscated. Best thing to do is be prepared - have no liquids over 3 ounces unless you can confirm your flight isn't subject to the gate screening.
IME generally speaking from the EU the gate screening consists of a possible additional security screen (metal detectors etc) but mostly someone asking me questions about my baggage (did I pack it, did I let it out of my sight etc). From Asia is where I've seen the hand inspection of carry-ons, and in terms of liquid confiscation it's only occurred to me coming from China. In fact I did bring on water on my last flight from HND - there were screeners on the jet way but no one said a word as we boarded.