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Mandela 'improving' as Obama lands in S.Africa

A portrait of US President Barack Obama is seen amoung flowers and notes left for South African President Nelson Mandela in front of the Mediclinic Heart Hospital in Pretoria on June 28, 2013. US President Barack Obama flew to South Africa Friday hoping t US President Barack Obama arrived in South Africa on Friday to pay homage to his hero Nelson Mandela, who was said to be showing "great improvement" in hospital.