DALLAS (AP) — Almost 10,000 flights have been canceled for the weekend across the U.S. as a monsterstorm expected to wreak havoc across much of the country bears down. The storm threatens to knock out power for days and snarl major roadways. Roughly 140 million people were under a winter storm warning from New Mexico to New England. The National Weather Service forecast warns of widespread heavy snow and a band of catastrophic ice stretching from east Texas to North Carolina. The edge of the storm was sending freezing rain and sleet into parts of Texas on Friday night into Saturday, while snow and sleet were falling in Oklahoma.