Everyone was killed when a Black Hawk helicopter and a commercial American Airlines aircraft collided at the end of January.
The Black Hawk was in the middle of a training exercise when the plane was coming to land at Ronald Reagan National Airport.
Investigations were started to determine the reasons of the crash after both planes plunged into the Potomac River.
Along with the three people on the helicopter, authorities were able to ascertain that 64 passengers on the plane perished.
The helicopter crew may have gotten inaccurate information about their altitude prior to the plane striking it, according to the incident’s investigators at the time.
According to reports, one pilot believed they were at 400 feet, while the other believed they were at 300 feet. The NTSB is not yet ready to specify the precise altitude at which the helicopter was at the time of impact, though.
