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Infographic: When Did GM Know It Had An Ignition Switch Problem?

GM CEO Mary Barra testifies on Capitol Hill today about the company's knowledge of a faulty ignition switch linked to at least 13 deaths.
By Ronnie Polidoro
GM CEO Mary Barra is on Capitol Hill today to testify about the company's decade-long knowledge of a faulty ignition switch it now admits is linked to at least 13 deaths and dozens of crashes.

GM CEO Mary Barra will be on the hot seat today as Congress grills the GM chief and government regulators over what took the company so long to issue a recall over a fatal ignition switch defect. Barra, who took over as CEO earlier this year will apologize in her testimony before the House Committee on Energy and Commerce and promise a "thorough and unimpeded" investigation. The defect has been linked to engine stalls and failure of airbags.

Families of victims of the defective GM ignition switches also plan to speak before the House hearing convenes.

NBC's Tom Costello will have more tonight on Nightly News with Brian Williams.

Ronnie Polidoro

Ronnie Polidoro is a producer for "NBC Nightly News with Brian Williams" in New York. He would like you to hold your phone horizontally when taking video.