Hillary Clinton testifies for more than five hours before two congressional committees . Clinton , at one point , grew exasperated with line of questioning over Benghazi response . Some Republican lawmakers say they are not satisfied with Clinton 's answers . Comment:
Hillary Clinton testifies for more than five hours before two congressional committees . Clinton , at one point , grew exasperated with line of questioning over Benghazi response . Some Republican lawmakers say they are not satisfied with Clinton 's answers . Four Americans killed in September 11 attack , including U.S. ambassador to Libya .