the emergency chutes. they didn't deploy. firefighters climbed up on the wing and they helped these people some of them without jackets on climb out, walk off of the plane and trudge on the snowy runway through the cold through the ice and snow to safety. but remarkably everybody was able to walk away from this. and another thing that is being looked into right now, just minutes before this plane landed runway conditions the braking conditions were reported to be good by two other planes. it just goes to show the dangers of taking off and in this case landing in this icy weather, winter weather that has caused a number of travel delays in the new york area and across the country. john and christine? >> the runway accident at laguardia making a bad travel situation even worse across the country. >> that storm and the cancellations of nearly 5,000 flights in the u.s. on thursday. that means more than 20% of all flights never left the ground. icy conditions made travel on roads just as tough.