Hi,
I'll be flying into LAX next week to catch a UA flight. I understand there are 2 terminals that AA use (Terminals 3 & 4) and that #3 is used only for flights to SJC, PHX, and other specific cities). I'm coming from AUS and I just realized that my plane might park at terminal 3 so it can fly to SJC or wherever else). Is this likely or is there a seperate "fleet" that serves Term 3?

If my flight arrives at Terminal 3, is there any airside bus between Terminal 3 & 4 (so I can go on to UA terminals behind the security firewall via the tunnel under the southern terminals)?

Thanks!