The following is a list of important dates in the Abu Ghraib prison abuse scandal:

2003

• June 30: Army Reserve Brig. Gen. Janis Karpinski named commander of all military prisons in Iraq.

• Aug. 31-Sept. 9: A team of counter-terrorism experts investigating prisoner interrogations in Iraq concludes that although the prisons should provide a "safe, secure and humane environment that supports the expeditious collection of intelligence, … it is essential that the guard force be actively engaged in setting the conditions for successful exploitation of the internees."

• October: The 372nd Military Police Company ordered to guard Abu Ghraib prison near Baghdad.

• Oct. 13-Nov. 6: A team of military police and legal and medical experts reviews the prison system in Iraq; it concludes that there are possible manpower, training and human rights problems that should be addressed immediately.

2004

Jan. 13: A Member of the 800th Military Police Brigade tells superiors about prison abuses, and Pentagon officials are informed. Defense Secretary Donald H. Rumsfeld is told a day or so later. Shortly afterward, Rumsfeld tells Bush.

• Jan. 14: U.S. commander in Iraq, Army Lt. Gen. Ricardo Sanchez, opens criminal investigation of abuses.

• Jan. 16: U.S. Central Command announces that an investigation of prison abuses is underway.

• Jan. 17: Sanchez formally advises Karpinski that there are serious deficiencies in her command and that the performance reflects a lack of leadership. Karpinski is later suspended from duty.

Jan. 19: Sanchez asks for a high-level review of prison procedures.

• Jan. 24: Lt. Gen. David McKiernan, U.S. ground forces commander in Iraq, is directed to conduct the review.

Jan. 31: Maj. Gen. Antonio M. Taguba is named chief investigator on the review.

• Feb. 2: Taguba and his team visit Abu Ghraib.

• March 3: Taguba's preliminary findings are presented to McKiernan; they point to members of the 372nd Military Police Company and intelligence operatives as the abusers.

• March 13: The Army's Criminal Investigation Division charges six soldiers with counts ranging from conspiracy to indecent acts.

• April 6: McKiernan approves some report recommendations, including letters of reprimand for six MPs and noncommissioned officers; two are relieved of duties.

• April 28: "60 Minutes II" shows photographs of prisoners forced to engage in simulated sex acts.

• May 3: Senate Armed Services Committee Chairman John W. Warner (R-Va.) asks Pentagon officials to testify before his committee the next day.

• May 4: Defense Secretary Donald H. Rumsfeld says those responsible will be brought to justice and widens investigations of prisons outside Iraq and Afghanistan. National security advisor Condoleezza Rice tells the Arab world that the abuses will be investigated and the perpetrators punished. Army officials give Senate committee a private briefing.

May 5: President Bush appears on two Arab television channels, saying those responsible for the abuses will be brought to justice. Rumsfeld agrees to testify before the Senate committee on May 7.