UPDATE: the Taliban debate on Radio 4 has now finished and I've closed the live chat. The chat will be archived here permanently and we've lifted the seven-day limit on the radio debate so you'll be able to listen again whenever you like. If you listened, or took part in the online debate, please leave a blog comment here and tell us what you thought. And for news of forthcoming debates and events, follow @BBCRadio4 on Twitter and 'like' our page on Facebook. 6n2dz

The debate is under way. Has the Taliban Won in Afghanistan? is on BBC Radio 4 now. lists include Peter W. Galbraith, outspoken critic of the 2009 presidential elections in Afghanistan and Lieutenant General Sir Graeme Lamb who was working, until recently, as a senior advisor to US General McChrystal. the debate by typing your comments directly into the live chat below or, if you're on Twitter, by tweeting with the hashtag #TalibanDebate.

I'm hosting the debate and Radio 4 Producers Jo Mathys and Hugh Levinson are on hand. We'll publish as many of your comments as we can. We'll close the live chat at 2100, fifteen minutes after the programme ends, and we'll archive the whole debate here. We've also made sure that the programme will be available to listen to on the Radio 4 web site indefinitely.

Steve Bowbrick is editor of the Radio 4 blog

• Listen to Radio 4 on 92-95 FM, on DAB, on your digital TV or, from anywhere in the world, online. More details on the Radio 4 web site.
• The debate was recorded at Chatham House in London last night.

http://www.bbc.co.uk/programmes/b00tmtqc

We'd like you to tomorrow's Radio 4 debate about the outcome of the war in Afghanistan. Host Eddie Mair is heading over to Chatham House to record the programme after he's finished on PM this evening, for transmission at 2000 tomorrow. We'll be opening the discussion here on the blog half an hour before transmission at 1930 and producers Hugh Levinson and Jo Mathys will be on-hand to host the debate.

There are two ways to in: either tweet using the hashtag #TalibanDebate or type your comment directly into the live chat here on the blog. We'll publish as many of your messages as we can during the debate and the live chat will be archived permanently after it finishes.

Steve Bowbrick is editor of the Radio 4 blog

• Listen to the debate on Radio 4 FM (92 - 95), DAB, digital TV or on the Radio 4 web site at 2000 on 8 September 2010.
• The picture shows Taliban in Afghanistan. It's from the BBC News web site.