WASHINGTON, DC - APRIL 1:  General Motors CEO Mary Barra prepares to testify before the full House Energy and Commerce hearing room in a hearing entitled "The GM Ignition Switch Recall: Why Did It Take So Long?" April 1, 2014 on Capitol Hill in Washington, DC. The panel is investigating a safety defect that's been linked to at least 13 deaths and has sparked a 2.6 million-vehicle recall.  (Photo by Allison Shelley/Getty Images)