U.S. Sen. Jeff Sessions of Alabama questioned U.S. Homeland Security secretary Janet Napolitano this morning about the firing of a Colorado immigration agent and asked why the agent's supervisor still has a job, despite the agency's finding that he was not telling the truth about the accessing of a restricted federal database. "I am not personally familiar with this," Napolitano replied during a Senate Judiciary Committee hearing on Homeland Security. "But I will become personally familiar with it." The exchange is the first public indication that Sessions is closely following the case of Immigration and Customs Enforcement agent Cory Voorhis....