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.

A military helicopter was flying above the maximum altitude for its route when it collided with a passenger plane near Washington D.C. last week, authorities said. The National Transportation Safety Board said in an update on Tuesday that it obtained data,

Fort Belvoir on a routine training flight and never came home. These soldiers knew the risk when they put on the uniform. In fact, two of them experienced combat overseas. Sadly, their deaths just prove the danger service members face every day.

The names of two of the three soldiers who were on the U.S. Army helicopter that collided with an American Airlines flight on have been released.

Jo Ellis posted a “proof of life” video on Facebook after right-wingers accused her of flying the Black Hawk that crashed into a passenger jet.

A key safety system was turned off on the US Army helicopter that collided with an American Airlines regional jet last week near Washington’s Reagan Airport, killing 67. Senate Commerce Committee chair Ted Cruz told reporters the Black Hawk helicopter had turned off its automatic dependent surveillance-broadcast (ADS-B),