The National Transportation Safety Board (NTSB) has disclosed critical findings in its investigation into the recent deadly midair collision involving a Black Hawk helicopter and a passenger jet near Reagan National Airport. Preliminary reports indicate that the Black Hawk crew may not have heard crucial instructions from air traffic control, specifically regarding a directive to pass behind a D.C.-bound plane. These communication issues, along with potential altimeter errors and the use of night vision goggles, could have contributed to the crash. A detailed timeline of events leading to the accident has also been compiled, yet questions remain regarding the exact causes. The NTSB continues to examine the circumstances surrounding the incident, highlighting concerns over altitude discrepancies and possible technical failures of the helicopter.