EASTERN U.S.: One of the worst blizzards in 70 years descended on much of the eastern U.S., stranding travelers and sending hundreds of workers and children home to play in the snow. With 20 to 30 inches of snow already on the ground, snow continues to fall in a broad swath from eastern Tennessee to Massachusetts. States of emergency have been declared in many eastern states, including Kentucky, Pennsylvania, West Virginia, Virginia, Maryland, New York, New Jersey and Delaware. In New York City, schools were closed for the first time since 1978, and the New York Stock Exchange operated for only three hours because of the weather. The storm closed airports across the east coast, slowed automobile travel to a crawl, and even closed some subway lines in New York City and in Washington, where 200 people were stranded for hours without heat on a stalled Metro train. Up to 3 feet was forecast in sections of Pennsylvania, New Jersey and New York.