Investigators trying to determine what caused last week’s deadly midair collision between a US military Black Hawk helicopter and an American Airlines plane near Washington, DC, briefed lawmakers Thursday on what they’ve learned after combing through data from both aircraft and air traffic control.

Investigators are currently working to download data from helicopter and jet black boxes to uncover additional information pertaining to the crash.

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

A military helicopter was carrying out a secretive training mission when it collided with an American Airlines passenger jet, the details of which are mostly “classified,” officials

Six days ahead of schedule, officials on Tuesday announced the section of the Potomac River affected by the deadly collision between an American Airlines jet and military helicopter had been fully restored.

In a major update, the US National Transportation Safety Board and the Federal Aviation Administration retrieved parts of the wreckage of the Black Hawk helicopter on 7. The helicopter collided with an American Airlines jet on January 30.

The wreckage of a Black Hawk helicopter that crashed into a plane above the Potomac River has been recovered from the water. Footage captured by the National Transportation Safety Board shows the recovery of a Sikorsky UH-60 military helicopter from the river near Ronald Reagan Washington National Airport on 7.