Here's a look at what you need to know about the 2003 CIA leak involving then-agent Valerie Plame and senior members of the George W. Bush administration.
After a lengthy investigation, one member of the Bush administration, Lewis "Scooter" Libby, is brought to trial and convicted of obstruction of justice, perjury, and making false statements.
February 2002 - U.S. Ambassador Joseph Wilson travels to Niger for the CIA.
March 2002 - Wilson tells the CIA he doubts Iraq tried to purchase uranium from Niger.
January 28, 2003 - In his State of the Union speech, President Bush says, "The British government has learned that Saddam Hussein recently sought significant quantities of uranium from Africa."
June 12, 2003 - According to the New York Times, a conversation takes place between Vice President Dick Cheney and his Chief of Staff Scooter Libby about the identity of Valerie Plame.
June 23, 2003 - According to 2007 testimony by Judith Miller of the New York Times, the date when Scooter Libby revealed to her that the wife of former Ambassador Joseph Wilson may have worked for the CIA.
July 6, 2003 - Wilson's editorial piece appears in the New York Times: What I Didn't Find in Africa.
July 11, 2003 - Karl Rove, President George W. Bush's top political adviser, told Time reporter Matthew Cooper that former U.S. Ambassador Joseph Wilson's wife "apparently works at the CIA on WMD issues," according to an e-mail Cooper sends to his editor.
July 13, 2003 - Matthew Cooper's A Question of Trust is posted on Time magazine's website. The article about President Bush's 2003 State of the Union speech includes named sources as Vice President Cheney's assistant Scooter Libby, Joseph Wilson, Valerie Plame's superior Alan Foley, and former State Department proliferation expert Greg Thielmann.
July 14, 2003 - Robert Novak's Chicago Sun-Times column names Joe Wilson's wife, Valerie Plame, as a CIA agent. He lists two senior administration officials as sources. (At the time, Robert Novak also works at CNN.)
September 29, 2003 - Karl Rove denies any knowledge of the leaked name when asked by an ABC reporter.
September 2003 - The Justice Department launches a full criminal investigation into the leak, an aggravated felony punishable by up to ten years in prison and a $10,000 fine.
September 30, 2003 - President Bush says, "If there is a leak out of my administration, I want to know who it is. And if the person has violated the law, the person will be taken care of."
February 15, 2005 - A federal appeals court in Washington rules that Judith Miller and Matthew Cooper may have witnessed a federal crime (disclosure by government officials of a CIA officer's identity), and will have to cooperate with the grand juries investigating the crime.
June 27, 2005 - The U.S. Supreme Court declines to hear appeals by Miller and Cooper.
June 30, 2005 - Norman Pearlstine, Time's editor-in-chief, agrees to provide documents concerning the confidential sources of Cooper to a grand jury.
July 6, 2005 - New York Times reporter Judith Miller goes to jail to protect the identity of the person who leaked the identity of a CIA agent to her, despite never having written a story using the information.
July 12, 2005 - Matthew Cooper appears before a grand jury investigating the case.
September 19, 2005 - Scooter Libby calls Judith Miller in prison to free her from the pledge of confidentiality. She is released on September 19.
October 12, 2005 - Judith Miller testifies for over an hour before a federal grand jury about a second conversation she had with Libby.
October 28, 2005 - Scooter Libby is indicted on one count of obstruction of justice and two counts each of perjury and making false statements. He resigns his position at the White House.
November 3, 2005 - Scooter Libby pleads not guilty at his arraignment and is released on his own recognizance.
April 26, 2006 - Rove makes his fifth and final appearance before the federal grand jury investigating the leak.
June 13, 2006 - Karl Rove is told by special counsel Patrick Fitzgerald that he will not be charged in the CIA leak case, according to Robert Luskin, Rove's lawyer.
July 13, 2006 - Valerie Plame and her husband Joseph Wilson file a lawsuit in U.S. District Court against Dick Cheney, Karl Rove and Lewis "Scooter" Libby. The suit alleges that they conspired to ruin Plame's career in order to seek revenge against Wilson for criticizing the Bush administration's motives in Iraq.
September 7, 2006 - Former Deputy Secretary of State Richard Armitage publicly acknowledges for the first time that he was the source who first revealed Valerie Plame's identity to Robert Novak, which he said he did inadvertently. His name is added to the Plame/Wilson lawsuit a week later.
January 16, 2007 - Scooter Libby's trial begins.
March 6, 2007 - Libby is found guilty of four of five counts in his perjury and obstruction of justice trial.
June 5, 2007 - Libby is sentenced to 30 months in prison for lying to investigators about what he told reporters about CIA operative Valerie Plame Wilson, two years of probation after his prison sentence, fined $250,000 and $400 dollars in court costs.
June 14, 2007 - Judge Reggie B. Walton rules that Libby is not to remain free (he must begin serving his 2 1/2 year sentence) while his appeal is pending. His attorneys state they will appeal this decision to the DC Circuit Court of Appeals.
July 2, 2007 - A three-judge panel of the U.S. Court of Appeals for the D.C. Circuit rejects Libby's bid to remain free on bond while appealing his conviction ruling that Libby has not raised a question for judges "that is 'close' or that 'could very well be decided the other way" - the standard for remaining free on appeal.
July 19, 2007- A federal judge in Washington, DC, dismisses the lawsuit brought by Valerie Plame Wilson and Joe Wilson against Vice President Dick Cheney, Scooter Libby and Karl Rove. A federal appeals court later upholds the dismissal.