The collision occurred late night on Wednesday because the airliner got here into land after a routine flight from Wichita, Kansas.
Reagan Nationwide is a significant airport situated a brief distance from downtown Washington, the White Home and the Pentagon.
The airspace is extraordinarily busy, with civilian and army plane nearly always transferring within the space.
“I believe there are numerous speculations at this stage, and the investigation hasn’t actually begun,” Hassan Shahidi, chief government of the impartial Flight Security Basis, instructed AFP.
“There are completely different shifts … that are available and are put along with the correct workers to deal with the quantity of site visitors.
“Typically air site visitors controllers deal with one frequency. Typically they deal with two frequencies. Typically they deal with greater than two frequencies.
“That’s all depending on the state of affairs, on the site visitors degree, and the time of day. This was at night time, at 9pm, when the site visitors is subsiding.”