WASHINGTON – Shoppers jammed aisles and emptied stores of milk, bread and shovels Friday as a massive snowstorm blew into the Mid-Atlantic. Forecasters predicted a record 30 inches or more for the nation's capital, and authorities already were blaming the storm for the deaths of father-son Samaritans in Virginia. The region's second snow storm in less than two months could be "extremely dangerous," and heavy, wet snow and strong winds threatened to knock out power, the National Weather Service said. Flakes started falling around noon in Washington, where the federal government sent workers home early. The storm's wide swath and...