Snow and ice snarled road travel and forcing another round of airline cancellations.
Train was traveling at triple the speed limit for section where it derailed.
Train was going 82 mph entering 30 mph curve, investigators say.
NTSB said investigators could spend up to 10 days probing the accident.
Shopping spree began early as retailers opened on Thanksgiving through Black Friday.
Needed repairs to HealthCare.gov site will push back launch 1 year.
A large storm already blamed for at least eight deaths in the West slogged through Oklahoma, Texas, New Mexico and other parts of the Southwest on Sunday.
The U.S. president could be pressed to support the monarchy in its land dispute with Algeria.
Homemade raft with a sole survivor found floating in Biscayne Bay.
50 survivors will take part in the 72nd commemoration of Dec. 7.
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