May 4, 2004: Rumsfeld claims to have read only part of the Taguba report. He says he read an executive summary. (AP, 5/4/2004)
May 4, 2004: Gen. George Casey states that since December 2002, there have been 35 Army criminal investigations into the treatment of detainees in Iraq and Afghanistan. 25 involve deaths. Two were classified as homicides.(ABCNEWS)
May 5, 2004: The Senate Intelligence Committee hears from CIA officials and the head of Army Intelligence in closed session. No names are provided. (ABCNEWS)
May 5, 2004: White House press secretary Scott McClellan says: "We've only learned more recently about the precise nature of what occurred."
May 6, 2004: Bush aides leak news that the president scolded Rumsfeld for not telling him about the pictures. (Wash Post, 5/7/04)
May 6, 2004: Rumsfeld and Myers get first private look at the pictures.(Rumsfeld, Myers testimony, Senate Armed Services Committee)
May 6, 2004: Washington Post publishes more photos of prisoner abuses.
May 6, 2004: Attorney General John Ashcroft signals the Justice Department will be investigating alleged abuses of Iraqi prisoners by U.S. civilians. (ABCNEWS)
May 7, 2004: Testifying in front of a Senate Armed Services Committee hearing on Capitol Hill, Rumsfeld offers his deepest apologies to Iraqi victims of prisoner abuse, saying the culprits should be punished. He says he will not quit to respond to political pressure.
May 7, 2004: Salon magazine publishes story in which he says he was approached last spring by "senior officers" of the military's legal division, who "expressed apprehension over how their political appointee bosses were handling the torture issue."
May 9, 2004: Seymour Hersh prints article containing new details and pictures of abuse. (New Yorker)
May 10, 2004: President Bush appears at Pentagon news conference with Rumsfeld, says Sec. of Defense is doing a "superb job" that he is a "strong Secretary of Defense." White House spokesperson acknowledges receiving ICRC briefs on torture since March 2003.
May 11, 2004: Taguba appears before the Senate Armed Services Committee with Stephen A. Cambone, the undersecretary for intelligence, and Air Force Lt. Gen. Lance L. Smith, the deputy commander of the U.S. Central Command.
May 11, 2004: Video of Nick Berg, American civilian, being beheaded by group in Iraq allegedly linked to Zarqawi is posted on an Islamist website.
May 11, 2004: In an e-mail, Lt. Phillabaum takes full responsibility for failure of oversight but casts the abuse as the actions of sadistic individuals and not as any interrogation policy.
May 12, 2004: Members of Congress see additional pictures and video of Abu Ghraib abuse.
May 13, 2004: Rumsfeld makes an unannounced visit to Iraq, briefly touring Abu Ghraib and meeting with soldiers. He says U.S. administration lawyers are advising the Defense Department not to publicly release any more photographs of abuse.
May 13, 2004: NYT reports that CIA has used coercive interrogation methods against a select group of high-level AQ leaders that have been so brutal causing growing concerns inside the agency about the abuses.
May 13, 2004: The International Committee of the Red Cross issues a new report criticizing the imprisonment of hundreds of suspects at the U.S. Naval Base in Guantanamo Bay, Cuba.
Compiled by ABCNEWS' Brinda Adhikari, with additional reporting by ABCNEWS staff.