Eight months after four Americans died in a terrorist attack on the American diplomatic compound in Benghazi, Libya, a House committee held another hearing on Wednesday to examine whether the Obama administration mishandled the tragic events. What follows is an update on what is known about the Benghazi episode and why it has become such a political flash point: Q. Why is the House Committee on Oversight and Government Reform holding a new hearing on Benghazi? A. Committee investigators found two State Department officials who previously had not spoken publicly and who are scathingly critical of the administration’s response to...