Good morning! I fly CUN-LAX and then transfer to AS to SEA, all in first class. Looking at the past few days flights, the flights into LAX land at Terminal 6, which is also where I depart. Is there customs/immigration at T6, or do I have to get to TBIT to clear customs? If so, what's the best way to get back to T6 from there? Hoping I don't have to go outside to go through TSA again. Thanks for any help!