US Vice President Dick Cheney's former top aide Lewis Libby has pleaded not guilty in his first court appearence since his indictment in the CIA leak investigation.
Vice President Cheney's chief of staff has been named as a possible exposer of CIA operative Valerie Plame to a syndicated columnist, according to a book by former ambassador Joseph Wilson, Plame’s husband.
In a probe linked to discredited claims made about Iraq's nuclear ambitions, US investigators are reportedly preparing to force journalists to reveal confidential sources who may have leaked a CIA operative's identity.
The US Justice Department has launched a formal investigation into who leaked the identity of a covert CIA agent after her husband criticised the pre-war case for invading Iraq.
JOURNALISM UNDER FIRE