Mark Rossini, a former FBI special agent at the center of an enduring mystery related to [9/11] says he is appalled" by the newly declassified statements by former CIA Director George Tenet defending the spy agency's efforts to detect and stop the plot. Rossini, who was assigned to the CIA's Counterterrorism Center (CTC) at the time of the attacks, has long maintained that the U.S. government has covered up secret relations between the spy agency and Saudi individuals who may have abetted the plot. Fifteen of the 19 hijackers who flew commercial airliners (on 9/11) were Saudis. A heavily redacted 2005 CIA inspector general's report, parts of which had previously been released, was further declassified earlier this month. The Obama administration has [still] refused to declassify 28 pages dealing with Saudi connections. Rossini and another FBI agent assigned to the CTC, Doug Miller, learned in January 2000 that one of the future hijackers ... had a multi-entry visa to enter the U.S. But when Miller and Rossini attempted to warn FBI headquarters that al-Mihdhar could be loose in the U.S., a CIA supervisor ordered them to remain silent. Rossini says he is "deeply concerned" by how the agency continues to suppress information related to contacts between the CIA and Saudi Arabia, particularly when the spy agency is declassifying other portions of documents to show that it did everything possible to thwart the September 11, 2001 plot. "There would have not been a 9/11 if Doug's CIR [Central Intelligence Report] on al-Mihdhar was sent," he told Newsweek in an email. "Period. End of story."