Tonight, major delays in cancellations as a massive winter storm comes roaring in.

Tens of millions under winter weather alerts as the New York metro area braces for one of the biggest snowfalls in years.

Look at this plane in Rochester, taken off during rough conditions.

A third of flights canceled in some of the country's busiest airports and cars

crashing and sliding off the road out in Michigan, plus where we're going to see the most snow

later tonight. Also tonight, the nightmare wall of water, mud and debris sweeping through

Southern California as high of rooftops what our team found on the ground. The new video of U.S. strikes on ISIS targets in Nigeria on Christmas,

and the new questions over why now and why there.

And from laptops, tablets, even our phones, the fire threat from lithium ion batteries on planes.

Are airlines equipped to handle them?

And the post-Christmas return rushes on with an

estimated one in six gifts set to be returned this year, what you need to know to get that full

refund. And the big question in the sports world, did Travis Kelsey already play his last home

game with the Chiefs? And what's he doing next? And there is good news tonight about the kindness of strangers and generosity being returned

when you're kidding me.

This is NBC Nightly News with Tom Yamas.

Good evening.

I'm Gotti Schwartz.

In for Tom, and we start with a major snowstorm rolling in on one of the

busiest travel weekends of the year. Right now, New York and New Jersey are under states of emergency as

Northeast races for the biggest snowfall it is seen in years. And it's already causing rough conditions at

airports like this one. Look at this map. See all that red? Those are airports dealing with

...