When the video of bin Linden was leaked to the press al-Qaeda releazed that we had access to their secret network and shut the whole thing down:

Al Qaeda’s Internet communications system has suddenly gone dark to American intelligence after the leak of Osama bin Laden’s September 11 speech inadvertently disclosed the fact that we had penetrated the enemy’s system.
The intelligence blunder started with what appeared at the time as an American intelligence victory, namely that the federal government had intercepted, a full four days before it was to be aired, a video of Osama bin Laden’s first appearance in three years in a video address marking the sixth anniversary of the attacks of September 11, 2001. On the morning of September 7, the Web site of ABC News posted excerpts from the speech.
But the disclosure from ABC and later other news organizations tipped off Qaeda’s internal security division that the organization’s Internet communications system, known among American intelligence analysts as Obelisk, was compromised. This network of Web sites serves not only as the distribution system for the videos produced by Al Qaeda’s production company, As-Sahab, but also as the equivalent of a corporate intranet, dealing with such mundane matters as expense reporting and clerical memos to mid- and lower-level Qaeda operatives throughout the world.

Go read the rest.
Amazing! It’s as if our intelligence agencies don’t get that we are at war.
Here’s more:

A small private intelligence company that monitors Islamic terrorist groups obtained a new Osama bin Laden video ahead of its official release last month, and around 10 a.m. on Sept. 7, it notified the Bush administration of its secret acquisition. It gave two senior officials access on the condition that the officials not reveal they had it until the al-Qaeda release.
Within 20 minutes, a range of intelligence agencies had begun downloading it from the company’s Web site. By midafternoon that day, the video and a transcript of its audio track had been leaked from within the Bush administration to cable television news and broadcast worldwide.
The founder of the company, the SITE Intelligence Group, says this premature disclosure tipped al-Qaeda to a security breach and destroyed a years-long surveillance operation that the company has used to intercept and pass along secret messages, videos and advance warnings of suicide bombings from the terrorist group’s communications network.
[…]
The precise source of the leak remains unknown. Government officials declined to be interviewed about the circumstances on the record, but they did not challenge Katz’s version of events. They also said the incident had no effect on U.S. intelligence-gathering efforts and did not diminish the government’s ability to anticipate attacks.
[…]
She spoke first with White House counsel Fred F. Fielding, whom she had previously met, and then with Joel Bagnal, deputy assistant to the president for homeland security. Both expressed interest in obtaining a copy, and Bagnal suggested that she send a copy to Michael Leiter, who holds the No. 2 job at the National Counterterrorism Center.

I hope that someone will investigate this so that we can find out where the leak came from.