On the frontline: refocusing on Afghanistan

It has been nearly 12 years since the US-led invasion of Afghanistan, and 2013 is set to be a defining year in the country’s recent history. Join author and award-winning journalist Christina Lamb, Afghan American author Tamim Ansary and others, in a discussion chaired by the BBC's David Loyn to look at what the year ahead holds for Afghans and foreign troops stationed in the country.