When Vice President Cheney's former chief of staff goes on trial Tuesday on charges of lying about the disclosure of a CIA officer's identity, members of Washington's government and media elite will be answering some embarrassing questions as well. I. Lewis "Scooter" Libby's case will put on display the secret strategizing of an administration that cherry-picked information to justify war in Iraq and reporters who traded freely in gossip and protected their own interests as they worked on one of the big Washington stories of 2003. Later, when a leak investigation was opened, prosecutors allege that Libby lied to FBI...