A JetBlue Airbus A321 heading from Boston to Tampa was thirty miles west of New York when the cockpit suddenly called Center and said, “We had a customer vape in the lav and was smoking marijuana in the lav. We would like to return to Boston.” The pilots made it clear that their flight attendants had inhaled the smoke and that they were planning an emergency return. As they descended, the cockpit added, “We will be planning an overweight landing” while one of the pilots sounded like he was breat