thanks for all the info!
Analise- i am international student so i dont think i can travel w/o any check in baggage
guv1976- you mentioned about re-check at T4 bag drop. So i do not go out after customs and head to a transit area where i check my bag and collect my boarding pass from Jet Blue? Since i purchased the Jet blue ticket from Emirates i believe they have interline-baggage agreement?
When dropping my baggage for check in do i have to go through all the security checks for my check-in baggage or just the hand carry?