Here is the PDF transcripts of Khalid Sheikh Mohammed, Abu Faraj al-Libi and Ramzi Binalshibh (in that order):

http://i.a.cnn.net/cnn/2007/images/03/14/transcript_ISN10024.pdf

http://i.a.cnn.net/cnn/2007/images/03/14/transcript_ISN10017.pdf

http://i.a.cnn.net/cnn/2007/images/03/14/transcript_ISN10013.pdf

Source of article (and link to CNN video of Khalid Sheikh Mohammed):

http://www.cnn.com/2007/US/03/15/guantanamo.mohammed/index.html?section=cnn_latest

Khalid Sheikh Mohammed: I was behind 9/11, transcript says

Story Highlights

• Transcript is from Saturday hearing at Guantanamo; released by Pentagon
• Mohammed: "I was responsible for the 9/11 operation, from A to Z"
• Transcript says he's responsible for other attacks, including Bali bombing
• Mohammed is among 14 prisoners identified by U.S. as "high value"

From Mike Mount
CNN

WASHINGTON (CNN) -- Khalid Sheikh Mohammed has admitted responsibility for the 9/11 attacks and a catalog of other terrorist acts, according to an edited transcript of a tribunal at Guantanamo Bay, Cuba.