Snow and wind continue to trap holiday travelers at airports and train stations along the east coast, with reverberations across the country. LaGuardia and Newark Liberty airports will remain closed until further notice, while John F. Kennedy is slated to reopen at 6 p.m. Monday. On Sunday night, relatively fortunate travelers snagged luggage carousels and cots to sleep, while everyone else slept on the floor. "It looked like everybody was camping inside," said one man stuck at LaGuardia. Over 2,500 flights have been cancelled since the blizzard began this weekend. In Massachusetts, coastal flooding has been a problem. Restaurants at JFK are reportedly running out of food. Amtrak resumed limited trips between Boston and New York after canceling them Sunday, but a spokesman said many trains may already be sold out.