Welcome to Meet the Press Now.

I'm Kristen Welker in Washington, where we are following new developments in the investigation into Wednesday's tragic mid-air collision that killed all 67 people aboard a passenger jet and a military Blackhawk helicopter.

Amid the aftermath of the incident, the FAA today implemented new helicopter restrictions in the D.C. area,

which comes as we are getting a look at new footage of the moment the crash happened, which we should warn you, may be disturbing.

This video shows the moment of impact as the American Eagle jet on approach to Reagan National Airport collided with an Army Blackhawk helicopter,

sending them both plunging into the icy Potomac River.

NBC News has learned that investigators are now looking into whether

the helicopter was flying at too high of an altitude. They won't know for sure until they recover

the helicopter's black box data recorder. The NTSB so far has recovered the black boxes from the

passenger jet, but is waiting on assistance and expertise from the military to recover the helicopters.

In addition, a source familiar with the investigation tells NBC News, an air traffic control supervisor at the airport left their shift early,

leaving one controller handling both airline and helicopter traffic at the airport, which is short-handed but acceptable

under FAA guidelines. This afternoon, local authorities gave an update on the recovery process,

including the difficult and delicate effort of retrieving the remains.

We've identified 41, or we have recovered 41 sets of remains, and 28 of those victims have been positively identified.

And as of 6 a.m. this morning, next to kin notifications have been made to 18 families.

Authorities say they expect to recover all of the victims, but they don't have an estimate on how long

that will take. It comes as the White House is facing renewed scrutiny over the president's

handling of the crisis after he baselessly speculated that the crash was the fault of

diversity initiatives at the FAA. The president yesterday signed a memo ordering an investigation

in hiring decisions and safety protocol at the FAA.

At today's White House briefing, press secretary Caroline Levitt backed up the president's claims about diversity hiring at the FAA, despite no evidence linking it to the collision.

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