Well hear from survivors who owe their lives to First Responders. Captioning sponsored by cbs this is the cbs evening news with Norah Odonnell. Odonnell good evening. This is our western edition. Tonight, we are on the eve of historic hearings on capitol hill where, for the first time, former special Counsel Robert Mueller will face questions about the nearly twoyear investigation that led to criminal indictments against 37 people and companies, including the president s onetime campaign chairman. The investigation found that the russian government interfered in our last president ial election in a sweeping and systemic fashion. But mueller did not recommend criminal charges against President Trump. Cbs news learned today mueller will not be alone when he testifies under oath tomorrow for five hours. His longtime righthand aide will be with him, and the Justice Department is trying to put limits on muellers testimony, including what he can why about the president. Incy cordes is on cap