21.   Investigators had not determined the cause of the accident, but Tjernberg said it happened on a slippery road during snowy and windy conditions.

22.   Lance Armstrong teammate Christian Vande Velde was forced to quit the Tour de France on Saturday after breaking his left forearm in a crash on a slippery road.

23.   Lance Armstrong teammate Christian Vande Velde was forced to quit the Tour de France on Saturday after breaking his left arm in a crash on a slippery road.

24.   One autobahn was closed for hours near Altdorf after a truck tipped over on the slippery road.

25.   Rural Texas school districts from Abilene to Wichita Falls canceled classes because of the slippery roads, as did schools in parts of northern New Mexico.

26.   Schools were closed because of slippery roads in parts of Alabama, Georgia, the Carolinas, West Virginia and Tennessee.

27.   Schools were closed because of slippery roads in parts of Alabama, Georgia, the Carolinas, West Virginia, Virginia and Tennessee.

28.   School systems canceled classes for the day because of slippery roads in northern sections of Alabama and Georgia and in western North Carolina.

29.   Rural Texas school districts from Abilene to Wichita Falls canceled classes because of the slippery roads, as did some communities in northern New Mexico.

30.   Schools were closed because of slippery roads in parts of Alabama, Georgia, the Carolinas and Tennessee.