Police believe the tape was made over a period of time.

White House officials said the tape might be made public later in the week.

The Government says the tape was made to help plan the attack.

More than four years later, he is still making tapes.

The tapes were made by employees or students working for video companies.

The tape was not released to the press nor made available to the public.

The tape was made at least six months before Sept. 11.

She hadn't known anybody had made tapes of her art.

It's not clear whether more than one tape was made of the sessions.

However, doubt remained as to when the tape had been made.