Now that the island has a modern international airport, people are making their way to St. Barts in ever-increasing numbers.
More people are visiting St. Barts now that the island has a modern airport.  
mnli hypothesis: More people are visiting St. Barts now that the island has a modern airport.   premise: Now that the island has a modern international airport, people are making their way to St. Barts in ever-increasing numbers.