After six long months, the Libyan capital is once again under threat. So much has changed since February - the rebels, backed by NATO, are emboldened and have the momentum.
But what has been happening inside Tripoli? Is there still strength in Muammar Gaddafi's regime? Is there some fight left in those who have stayed with their leader?
Inside Story, with presenter Kamahl Santamaria, discusses with Abdurahman Shalgam, the former Libyan foreign affairs minister and former Libyan representative to the UN; Tarik Yousef, a senior fellow at the Brookings Institution; and Henning Riecke, a NATO expert with the German Council on Foreign Relations.