MINEOLA, N.Y. (AP) — A sloppy mix of rain and snow rolled into the Northeast on Wednesday just as millions of Americans began the big Thanksgiving getaway, grounding hundreds of flights and turning highways hazardous along the congested Washington-to-Boston corridor. By early evening, more than 700 flights had been canceled, the bulk of them in the Northeast, during what is typically one of the busiest travel periods of the year. Schools and businesses also closed in some areas, and state government offices let workers go home early. Dan Albert hoped to beat the snow as he, his wife and 15-year-old daughter refueled their SUV Wednesday morning along I-81 in Hagerstown, Maryland, about halfway between their Greensboro, North Carolina, home and their Thanksgiving destination in Mahwah, New Jersey. At a rest stop on the New Jersey Turnpike, tired families grabbed large cups of coffee and breakfasts of pizza and fried chicken before heading back to the slushy road.