What To Know About The Ntsb And The Investigation Into The Dc Plane Cash

A collision between an American Airlines passenger jet and an Army helicopter near Washington, D.C., that killed 67 people brought renewed focus on the federal agency charged with investigating aviation disasters.

National Transportation Safety Board Chairwoman Jennifer Hommendy described the investigation into the crash Wednesday night as an "all-hands-on-deck event" for the agency during a news conference Thursday in which she appeared with members of the board and a senior investigator overseeing the probe.

Here are some things to know about the NTSB:

What does the agency do?

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 disasters and major accidents involving motor vehicles, marine vessels, pipelines and even commercial space operators.