hundreds of flights have been cancelled and correspondent bill whitaker is in snow-bound denver this morning. bill, good morning. >> reporter: good morning, jeff. this massive winter storm is tapering off here finally, moving east, losing strength as it passes over kansas and nebraska. but not before dumping a near record amount of snow and misery here in colorado. for the second night in a row, snow fell continuously, getting deeper and deeper, meaning more and more work for sam. he owns a snow removal company with a contract to keep denver's streets clear. >> it seems like you plow it once, it keeps snowing and you have to do it again. >> we go through and plow. covered and drifted again. >> reporter: this was the biggest storm to hit the region since 2007, one of the top ten storms on record. as it approached, people swarmed stores, stocking up and staying in. when it hit, it was with a vengeance, stranding thousands