In June I'll be flying from Manchester (UK) to LA (with London and NY inbetween) and vice versa on the way back, but this is the first time I'll be stopping over and I'm not sure what to expect. Even the British Airways site doesn't offer much support on this for such n00bs. Do I only have to pass security at the first airport? Do I have to claim my baggage at each airport and go through checking in again? I'm hoping it's as easy as possible!