Mary Barra, CEO of General Motors, was called before Senate and House Committees last week to explain why a faulty ignition switch, responsible for at least 13 crash deaths, was not recalled for several years in vehicles manufactured by GM. Barra, who served as Executive Vice President for Global Product Development, Purchasing and Supply Chain until January, told members of Congress that she had no knowledge of the switch problem prior to the recent recalls. Members of Congress were left frustrated. Neither Barra nor federal regulators provided good answers as to why the vehicles were not recalled sooner and the...