Hussein Enters Post-9/11 Web of U.S. Prisons: "The C.I.A. has quietly established its own detention system to handle especially important prisoners. The most important Qaeda leaders are held in small groups in undisclosed locations in friendly countries in the developing world, where they face long interrogations with no promise of ever gaining release. For example, at least two of the top Qaeda figures captured since the Sept. 11 attacks-Abu Zubaydah and Ramzi bin al-Shibh-were held for a time in a secure location in Thailand. They were later moved to another country, officials said. "