A PSA Airlines Bombardier CRJ700 regional jet collided with a Black Hawk helicopter while on approach at Reagan Washington National Airport at about 9 p.m. Wednesday.

An Army Black Hawk helicopter collided midair with an American Airlines flight from Wichita, Kansas, at Reagan National Airport on Wednesday.

The Post can reveal that grave lapses and miscommunications in one of the most crowded and complex patches of sky in the US are likely to blame.

The Black Hawk is a US Army workhorse helicopter. It has been flying for decades. One tragically collided with a passenger jet this week.

Investigators found the recording devices, or black boxes, from the American Airlines plane that collided with a helicopter Wednesday near Washington.

Ryan O’Hara, a father-of-one, was one of the three soldiers aboard the military helicopter, according to reports

An American Airlines jet collided midair with a military helicopter near Reagan National Airport. Four crew and 60 passengers were on board the plane.

The Army Black Hawk helicopter that collided with an American Airlines commuter plane near Reagan Washington National Airport in Virginia Wednesday was on a “training flight” when it crashed into the Potomac River, according to the military service branch.

Authorities say they believe no one survived a collision Wednesday night between an American Airlines flight and a U.S. Army Black Hawk helicopter. NPR correspondent Frank Langfit

Investigators say there are likely no survivors in the deadly aircraft collision that occurred Wednesday evening above the icy waters of the Potomac river.