Tonight, new details about those critical black boxes. The NTSB confident they will gather data from them as questions mount over air traffic control staffing.

What we're learning about the moments before, the deadly accident, the supervisor allowing an air traffic controller to leave early with just one left on duty.

Chopper flights near the airport now restricted and the close call involving similar

aircraft just a day before.

Plus the FAA struggling with air traffic controller recruitment, the head of the union, stark

warning.

It's a 30-year low in air traffic control staffing.

The lives lost, the young skaters and their parents

and what we're learning about the pilots involved. Breaking news in northeast Philadelphia tonight,

a fiery scene engulfing the streets following a jet crash there. Is at the start of a new

trade war President Trump set to impose 25% tariffs on Mexico and Canada, 10% on China, what it could mean for the price you pay.

And Andrea Mitchell in Panama as Marco Rubio makes his first trip as Secretary of State Fair, after President Trump threatened to take control of the canal.

This is NBC Nightly News with Lester Holt.

Good evening once again from Washington, where the NTSB has just released an update on its

investigation into Wednesday night's deadly mid-air collision near Reagan National Airport.

The lead investigators saying investigators have already started interviewing

air traffic controllers who were on duty at the time of the crash. This after days of outside

speculation as to whether there was proper control tower snapping at the time of the accident.

Officials also revealing they now have all the black boxes from the stricken airliner

and the Army Black Hawk helicopter

and are hopeful they will provide solid and critical data. Also today, the FAA moving ahead of the

investigation and is now restricting helicopter flight corridors within D.C. Nationals Airspace.

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