Q:

Transfer from JFK Terminal 2 to Terminal 4

I have family who does not speak English.
They are changing planes in JFK Airport and will most likely be transferring from Terminal 2 (Delta) to Terminal 4 (China Southern Airlines).
At first I thought that directing them to use the Airtrain would be best.
However, in doing more reading my understanding is that the Airtrain would mean they would need to go through security again.
I found this on Delta's site: JFK Delta Map
If they use the JITNEY Shuttle to change from Terminal 2 to Terminal 4, does that mean they would not need to re-clear Security?
Edit: They are flying TO China. They are going from Tampa -> NY JFK -> China.

A:

Yes.
The Delta Shuttles operate airside.  Passengers using this do not have to pass TSA again at the other Terminal building.
Note, this is only for domestic arrivals.  International arrivals must pass Immigration, Customs and then TSA to re-enter the Terminal. 

