By sunset Tuesday night, 24 hours after most vacationers were supposed to be back, less than 700 people had been flown out to Mexico City. Many times that number waited miserably on the runway or, worse, with thousands of other sweating, blank-eyed people in a roughly quarter-mile-long line outside the base. "It's horrible. We haven't eaten anything since nine in the morning," said Lizbeth Sasia, a 25-year-old teacher from Cuernavaca. "They keep telling us we'll be on the next flight, but the next flight never comes."