Joel Rose

The National Transportation Safety Board will meet nearly a year after the mid-air collision that killed 67 people.

It was the deadliest aviation disaster in the U.S.

in more than two decades.

The NTSB is not likely to identify a single cause.

Instead, investigators will lay out all the things that went wrong in the lead-up to the crash, and the board will recommend changes to help prevent a similar tragedy from happening again.

Already, the Federal Aviation Administration has taken the temporary restrictions it imposed after the crash and made them permanent.

to ensure planes and helicopters don't once again share the same airspace around Ronald Reagan Washington National Airport.

Joel Rose, NPR News, Washington.

Airline operations were battered by the weekend storm that dumped heavy snow and ice across more than a dozen states.

Sub-zero temperatures and other weather issues across the Northeast forced airlines to cancel thousands of flights and delay thousands more again on Monday, complicating their efforts to get aircraft and crews back in position for regular service.

The storm also impeded road travel across a wide swath of the central and eastern U.S.

In the south, ice brought down trees and power lines, cutting electricity to hundreds of thousands of homes and businesses.

with the most outages reported in Tennessee, Mississippi, and Louisiana.

Joel Rose, NPR News, Washington.

Sunday was the biggest single day for cancellations since the early days of the COVID pandemic in 2020, according to the aviation analytics company Sirium.

The vast majority of flights were canceled at some airports in the Northeast, around Washington, D.C., New York, and Boston.

American Airlines canceled more than half of its scheduled flights yesterday.

Delta and United, more than 40%.

In some places, the storm was all snow.

In others, it turned into sleet and freezing rain.