Mr. Libby, who was Vice President Cheney's former chief of staff is charged with lying to investigators and a grand jury about leaking the name of CIA agent Valeria Plame.

NPR: Focus Is on Cheney at Libby Trial

Mr Libby is accused of lying to the FBI and a grand jury in an investigation into the outing of a CIA agent.

ECONOMIST: After his toughest week, Bush comes out fighting | The

Federal Prosecutor Patrick Fitzgerald has presented a series of witnesses aimed at proving that Libby lied to the FBI and a grand jury when he denied leaking the name of an undercover CIA agent.

NPR: Libby's Attorneys Pick at Russert's Account of Leak