General David Petraeus, the US commander of international forces in Afghanistan, says the current military and development strategy in the country is working. In a speech at the Royal United Services Institute in London, he said progress has been; Kabul is a secure place to live; education and literacy has surged; businesses are thriving and people are returning to Afghanistan. He said military operations would, over time, seek to link the security in Kandahar with central Helmand. General Petraeus also said ISAF forces had allowed senior Taliban leaders to come into Kabul for talks with the Afghan government. Marco Werman speaks with Michael Codner of the Royal United Services Institute.