a group of military officers and intelligence analysts from testifying at an open Congressional hearing about a highly classified military intelligence program that, the officers have said, identified a ringleader of the Sept. 11 attacks as a potential terrorist more than a year before the attacks?Also (my emphasis):
Two military officers - an active-duty Navy captain and a reservist Army lieutenant colonel - have said publicly in recent weeks that they were involved with Able Danger and that the program's analysts identified Mohamed Atta, the Egyptian-born ringleader of the Sept. 11, 2001, attacks, by name as a potential terrorist by early 2000.topdog04 (at Kos) has more, with a lot of background:
They said they attempted to share the information with the Federal Bureau of Investigation in the summer of 2000, more than a year before the terrorist attacks, but were blocked by Defense Department lawyers. F.B.I. officials, who answer to the jurisdiction of Senator Specter's committee, have confirmed that Defense Department abruptly canceled meetings in 2000 between the bureau's Washington field office and representatives of the Able Danger team.
The Pentagon has said that it has interviewed three other people who were involved with Able Danger and who said that they, too, recalled the identification of Mr. Atta as a terrorist suspect. But Defense Department investigators said they could find no documentary evidence to back up the assertion; they acknowledged that much of the information might have been routinely destroyed.
First the Pentagon had never heard of Able Danger, then it was "merely" a planning effort that ran it's course in early 2001, now it is so top secret and vital to national security - more than four years after 9/11 - that no one can testify about it to Congress. ...
[Bryan Whitman, a Defense Department spokesman, said it was] "Not possible to discuss Able Danger in any great detail in an open public forum?" The Pentagon HELD A PRESS CONFERENCE ON IT two weeks ago. The only thing not possible is for the truth to get out about the mistakes of this administration and their culpability in 9/11.