As South Africans vote in a crunch general election, one key issue that's impacted the campaign is the policy of affirmative action the country began in 1994. A series of measures, known as the "Triple B double E Act" (Broad-Based Black Economic Empowerment), have favoured non-White South Africans in public or private jobs, as well as in university admissions. But these measures are now being contested by the opposition, who claim they perpetuate racial discrimination and do not promote good governance. So how has affirmative action impacted South African society over the past 30 years and should it stay or go? Our correspondents report from Cape Town.