HARDtalk - Nicholas Burns

Two months into his presidency and President Barack Obama has established a new tone in US foreign policy. Dialogue, engagement and smart diplomacy are all familiar buzz words, but do they amount to an effective strategy? At the end of his long US foreign service career, most notably as Under Secretary of State for Political Affairs, Ambassador Nicholas Burns talks to Stephen Sackur about whether the Obama approach will work in the face of intractable problems from Afghanistan to Gaza.