Dr Pervaiz Hoodbhoy, a leading Pakistan nuclear physicist and intellectual, says the Taliban pose a threat to Pakistan's existence and way of life, and that Pakistanis must work together to not only remove the threat they pose, but to eradicate the causes behind their support.

Viewers in the UK can watch Tim Whewell's Newsnight report from Pakistan in full on Tuesday 23 June 2009 on BBC Two at 1030BST.