The black boxes for a commercial flight that crashed into a military helicopter in Washington DC have been located, as questions mount about staffing and other close calls at the airport where the plane was landing.
Normally two people manage air traffic control for helicopters and airplanes flying in the area - one of the most controlled airspaces in the world - but only one person was on duty on Wednesday at the time of the crash, according to sources cited by the BBC's US partner CBS News.
Officials are still investigating the cause of the incident that killed all 67 people aboard the two aircraft.
The National Transportation Safety Board (NTSB) said a preliminary report will be issued in 30 days.
The flight data recorder and the cockpit voice recorder, known as the black boxes, can help offer clues to investigators about what may have gone wrong on the flight.
The boxes will be transported to the NTSB lab, nearby the site of the crash, and analysed, according to CBS.
The air traffic control staffing numbers, first reported by the New York Times, was noted as "not normal", according to a preliminary Federal Aviation Administration (FAA) report.
The federal government has struggled for years to fill certain key positions at the FAA.
The type of staffing that had one air traffic control worker managing both the helicopters and planes at the Regan Washington National Airport on Wednesday nightis reportedly not uncommon and did not breach guidelines.
Divers spent most of Thursday swimming through the icy waters of the Potomac River, searching for the bodies of victims.
The search was suspended on Thursday evening due to dangerous conditions.
There were 64 passengers aboard the American Airlines flight that collided with an Army Black Hawk helicopter that was on a training mission flight. Three soldiers were on board.
Teams have so far recovered 27 bodies from the plane and one from the helicopter.
At a White House briefing on Thursday, President Donald Trump began with a moment of silence and a prayer for victims.
He said "we can only begin to imagine the agony that you're all feeling", adding, "our hearts our shattered alongside yours".
Trump speculated on the cause of the collision, suggesting without evidence that lower hiring standards for air traffic controllers in the FAA under previous administrations run by Democrats may have been a factor.
Later on Thursday, he signed a memorandum to end diversity, equity and inclusion (DEI) practices in the aviation sector.
DEI programmes aim to promote participation in workplaces by people from a range of backgrounds. Backers say they address historical or ongoing discrimination and underrepresentation but critics argue they can themselves be discriminatory.
Trump also signed an executive order to appoint a new head of the FAA.
Source: BBC
Bd-pratidin English/Lutful Hoque
