Air traffic controllers interviewed and helicopter black box retrieved from DC air crash site
Authorities say that 28 people have been identified following Wednesday's fatal air crash near Washington DC, and expect to find all the bodies of the victims - so far, the remains of 41 have been recovered
Helicopter traffic around Ronald Reagan Washington National Airport has been restricted, which Secretary Sean Duffy says will ensure the safety of plane and helicopter traffic
President Trump says the helicopter involved "was flying too high" - but does not provide any evidence to back up the claim
White House spokeswoman Karoline Leavitt told reporters that the president "based that statement on the truth" from briefings he has received
An investigation is under way to establish what caused the collision between the US army helicopter and an American Airlines passenger plane, killing 67 people
Investigators have already recovered the flight data recorders, known as black boxes, from the wreckage of the passenger plane - a preliminary report into the crash will be issued in 30 days
Air traffic controllers interviewed and helicopter black box retrieved from DC air crash site