Lewis ""Scooter"" Libby was sentenced to two and a half years in federal prison Tuesday. Margaret Warner reports on the latest fall-out from the highly publicized case of drug resistant tuberculosis. Kwame Holman reports on the immigration debate over family ties versus job skills. Jeffrey Brown speaks with Brian Mockenhaupt, a freelance journalist whose article in the latest issue of Atlantic magazine details how the Army is recruiting and training U.S. soldiers. The guests this episode are Carol Leonnig, David Corn, Byron York, Susan Dentzer, Jon Kyl, Robert Menendez, Brian Mockenhaupt. Byline: Jim Lehrer, Margaret Warner, Kwame Holman, Gwen Ifill, Jeffrey Brown