Chris Bowlby profiles German Chancellor Angela Merkel - always underestimated, physicist and ruthless politician, the woman at the centre of the eurozone crisis. What has shaped a figure who grew up under East German communism, came to dominate united German politics and proclaims her love of football and opera? And as her friendship with David Cameron deepens, might she be key to Britain's EU future?
Producer: Chris Bowlby Editor: Richard Knight.