A quick guide to the NTSB as it investigates the DC plane collision

Contributing sentiments towards policy:

48% : WATCH: Trump baselessly blames diversity hiring for deadly D.C. plane collision Inman said those groups include operations, which will examine flight history and crewmember duties; structures, which will document airframe wreckage and the accident scene; power plants, which will focus on aircraft engines and engine accessories; systems, which will study the electrical, hydraulic and pneumatic components of the two aircraft; air traffic control, which will review flight track surveillance information, including radar, and controller-pilot communications; survival factors, which will analyze the injuries to the crew and passengers and crash and rescue efforts; and a helicopter group.

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