Nantucket Memorial Airport has run out of jet fuel at the peak of summer, impacting commercial and private flights at one of New England’s busiest transportation hubs. On Saturday the airport suspended jet fuel sales and informed commercial carriers that they needed to fly into the island fully loaded with fuel due to the shortage.Airport officials said Saturday night that they were not only facing overwhelming demand for jet fuel, but also a logistical nightmare in getting fuel tanker trucks to the island due to record competition for reservations this summer on the Steamship Authority ferries. They also cited a...