FBI Special Agent Robert Wright, Jr., who wrote the memo, led a four-year investigation into terrorist money laundering in the United States.

Wright began crying as he concluded his remarks at a Washington press conference Thursday.

"To the families and victims of September 11th - on behalf of [FBI Special Agents] John Vincent, Barry Carmody, and myself - we're sorry," Wright said before walking out of the room.Vincent and Carmody have also expressed a desire to expose information regarding alleged FBI missteps prior to Sept. 11.

Wright's June 9, 2001 "Mission Statement" memo warned that, "Knowing what I know, I can confidently say that until the investigative responsibilities for terrorism are transferred from the FBI, I will not feel safe.

"The FBI has proven for the past decade it cannot identify and prevent acts of terrorism against the United States and its citizens at home and abroad," he continued. "Even worse, there is virtually no effort on the part of the FBI's International Terrorism Unit to neutralize known and suspected international terrorists living in the United States."

The summary of Wright's attempts to expose the alleged failures of the FBI's anti-terrorism efforts ended with a solemn conclusion.

"Unfortunately, more terrorist attacks against American interests - coupled with the loss of American lives - will have to occur before those in power give this matter the urgent attention it deserves," he wrote.

Wright had written a manuscript, entitled "Fatal Betrayals of the Intelligence Mission," for presentation to Congress.

"The manuscript outlines, in very specific detail, what I believe allowed September 11th to happen," he explained.

Wright spearheaded the investigation code-named "Vulgar Betrayal," which led to the 1998 seizure of $1.4 million of U.S. funds "destined for terrorist activities."

The investigation determined that U.S.-based Hamas terrorists were using not-for-profit organizations "to recruit and train terrorists and fund terrorist activities in the United States and abroad, including the extortion, kidnapping, and murder of Israeli citizens."

The criminal investigations were initiated over the objections of FBI intelligence officers, who Wright charges did not want their probes of terrorist suspects interrupted or ended by the suspects' arrests for criminal activities.

"Vulgar Betrayal" was the first operation that culminated with the use of civil forfeiture laws to seize the U.S. assets of terrorist groups. The confiscated funds were directly linked to Saudi Arabian businessman Yassin Kadi, also known as Yassin al-Qadi, who has since been identified as one of the "chief money launderers" for Osama bin Laden.

Investigators believe he provided as much as $3 billion to the al Qaeda terrorist network before  Wright's investigation closed his operations.

Wright says that FBI management "intentionally and repeatedly thwarted and obstructed" his attempts to expand the investigation to arrest other terrorists and seize their assets.

On August 4, 1999, the FBI removed Wright from the "Vulgar Betrayal" operation, which was terminated shortly thereafter. All but the final three pages of his manuscript were completed in the following months. Those pages were added after Sept. 11.

"As a direct result of the incompetence and, at times, intentional obstruction of justice by FBI management to prevent me from bringing the terrorists to justice, Americans have unknowingly been exposed to potential terrorist attacks for years," he charged.

Nine factors entered into the FBI failures alleged in Wright's manuscript, including:

* Incompetent managers who are not held accountable for mistakes; * Lack of independent oversight of the bureau;

* Bias on the part of the FBI's internal affairs unit, the Office of Professional Responsibility;

* Antiquated computer technology; and

* Overlapping investigative jurisdictions of other federal law enforcement agencies such as the Drug Enforcement Administration and the Bureau of Alcohol, Tobacco, and Firearms.

In a May 29 letter to Wright's attorneys, John Collingwood, assistant director of the FBI's office of public and congressional affairs, forbid Wright to disclose the contents of the manuscript - in writing or orally - to anyone not approved by the bureau.

"Pursuant to [Wright's] employment agreement and FBI procedures, he is still not authorized to publicly disseminate information we have previously advised is prohibited from disclosure at this time," Collingwood wrote.

The letter also contained what Wright and his attorneys considered a threat, meant to intimidate them.

"We feel obliged to inform you [that] breach of an employee's employment obligations may be grounds for disciplinary action, a civil suit, or both," Collingwood warned. "In some instances, unauthorized disclosure may also constitute cause for revocation of a security clearance or be a criminal offense."

Those warnings seem to directly contradict the statements of FBI Director Robert Mueller Wednesday while announcing a "wartime reorganization" of his agency.

"It is critically important that I hear criticisms of the organization including criticisms of me in order to improve the organization, to improve the FBI," he said. "Because our focus is on preventing terrorist attacks, more so than in the past, we must be open to new ideas, to criticism from within and from without, and to admitting and learning from our mistakes."

Collingwood claimed in his letter that the opposition to Wright's public comments was not "solely" because Wright's comments might be "critical or disparaging of the FBI, the government, or its employees."

But Larry Klayman, chairman and general counsel of Judicial Watch, says Collingwood's "threats" prove that Mueller's words are meaningless.

"This new policy of the FBI was not sincere," Klayman said, "because at 5 p.m. [after Mueller's press conference] we got [Collingwood's] letter."

Judicial Watch, along with former House Judiciary Committee Special Counsel David Shippers, is representing Wright in a lawsuit against the FBI and five "unknown officials" for violation of his First Amendment free speech rights.

Wright has also filed complaints with the FBI's Office of Professional Responsibility and the Department of Justice Office of the Inspector General, and wants his manuscript and testimony subpoenaed by Congress.