Amy Held

National Weather Service meteorologist Frank Pereira says it could go down in history as the biggest.

With more than half the U.S.

population hit by some combination of snow, topping a foot in parts, ice, up to an inch or more, and cold, as low as sub-zero.

Officials say stay home, but for some people, that's outside.

Whitney Slater was sleeping in his car but moved to a warming center set up in Detroit.

The cold will lock in the snowpack for days.

In parts of the South, forecasters warn of catastrophic ice threatening the power system.

Amy Held, NPR News.

Snow topping a foot in parts, followed by ice, enough to snap tree limbs and power lines.

Then, record-breaking cold.

Philip Jones is with the Nashville Department of Transportation.

Jacqueline Thorpe in North Carolina worries for her husband, who she says needs access to life-saving care.

Even before the worst of it, airlines had canceled hundreds of flights.

And in Milwaukee and Chicago, extreme cold as low as negative 40 degree wind chill meant no school Friday.

Amy Held, NPR News.

After years of delays and cost overruns, NASA's huge new moon rocket had its red carpet moment.

four-mile slow roll to its launch pad for testing and rehearsals.

Ahead of its real test, the Artemis II mission launch window opens next month to send four astronauts farther into space than any human has ever gone, some 46,000 miles away around the moon for a look at the far side.

Reid Wiseman is mission commander.

NASA's not aiming to get humans back onto the moon until Artemis 3 by 2028.