The Mexican police and army are struggling to control armed drug cartels operating in cities across the country. In October 2010 fourteen people, mostly in their teens, were shot dead at a party in the border city of Ciudad Juarez. More than 28,000 people have died in the drugs war since President Felipe Calderon ordered the army into the fight in 2006. In an exclusive interview for HARDtalk he talks to Stephen Sackur about whether the war against the gangs can ever be won.