4 key takeaways from NTSB reports on deadly D.C. plane crash

The NTSB issued its preliminary report on the midair collision between a passenger plane and helicopter over Washington, D.C.
The preliminary report, released Tuesday, focuses on the flight history of the crew, the helicopter operator, air traffic control at the time of the crash ... noted by the NTSB is the ...
Helicopter routes near Reagan National airport regularly cause an “intolerable risk to aviation safety,” NTSB Chairwoman Jennifer ... Flight data uncovered early in the crash investigation ...
The NTSB’s urgent safety recommendations are outlined in a 20-page report detailing the circumstances of the crash and the initial investigation, but it does not pinpoint specific causes.
Federal investigators looking for the cause of the January collision between a passenger jet and an Army helicopter near ...