'Once in a generation' storm cripples Christmas travel across the U.S.
A powerful winter storm is making its way through the U.S. and Canada, bringing with it severe snow and freezing temperatures. The storm has already disrupted travel for many ahead of the holidays.
1:48
7:22
2:51
2:27
1:05
10:19
3:04
3:42
1:55
9:41
