On British TV news Colin Powell was shown before a committee (Senate committee?) explaining that this tape of "Osama Bin Laden" (and Colin Powell put in the little quote signs by hand!) would be heard during the coming day. Not only does it seem strange that Al Jazeera would make a preview available, but who gave the tape to whom?
Surely it is not beyond the wit of the US government to have a tape made up which will support their, unpopular, case for taking America to war. If they could then get the same tape plyed by Al Jazeera it would lend it credence.
Also, if the tape were produced by the US security services from known records of Osama then they would know (in advance) the likelihood of anyone being able to show it was not genuine.
Or am I just being cynical??

Nigel