What to know about the NTSB, the agency investigating the DC plane crash
A deadly midair collision between an American Airlines jet and an Army helicopter near the nation's capital is bringing ...
The Canadian Press on MSN22h
What to know about the NTSB and the investigation into the DC plane crash
The NTSB is an independent federal agency responsible for investigating all civil aviation accidents as well as serious incidents in the U.S. involving other modes of transportation, such as railroad ...