HARDtalk - Anders Fogh Rasmussen, Nato Secretary General

President Barack Obama has committed another 30,000 US troops to Afghanistan in the fight against the Taliban. Some other Nato members have also committed more troops. In an interview for HARDtalk, Stephen Sackur talks to the new Nato chief Anders Fogh Rasmussen. What does the Afghan conflict tell us about the state of the North Atlantic alliance?