Hello, I will be flying into SFO from International terminal G through United in the evening. I have a 4 hour layover in SFO before flying out of the domestic terminal 3. In that time, I'd like to meet up with some family members outside of security. 1) Will I need to grab my luggage and check it back in with me again? 2) If so, how long would you estimate it would take to go through customs, grab luggage, and then go through security again for my next flight? 3) What would be the best place out of security to meet for easy re-entry? 4) All that being done, how much time would you estimate I'd have leftover to meet up with them? Thanks!