Watch: NTSB enters second day of National Airport crash hearings

The National Transportation Safety Board (NTSB) resumed its probe Thursday into the deadly collision of an Army helicopter and passenger plane near Reagan Washington National Airport earlier this year, which killed 67 people.

On Wednesday, investigators found the Army Black Hawk helicopter was flying higher than it should have been and its altitude readings were inaccurate. The second day of hearings will largely focus on air traffic control training procedures and collision avoidance technology, according to the website.

The January crash, which marked the deadliest accident since 2001, sparked the Trump administration’s push to overhaul the Federal Aviation Administration (FAA) and invest more into updated technology and recruitment programs for air traffic control.

The event was scheduled to begin at 9 a.m. EDT.

Watch the video coverage above.