A young girl walks past rosaries hanging at a hawkers stall in Freedom Square, Soweto, South Africa, Monday, Dec 10, 2012. Various leaders and personalities have called for people to pray for former president Nelson Mandela as he underwent more unspecified medical tests in a military hospital in Pretoria as the public and journalists outside continued to ask the same, as of yet unanswered questions: What, if anything, is wrong with the 94-year-old anti-apartheid icon. (AP Photo/Denis Farrell)

Associated Press
A young girl walks past rosaries hanging at a hawkers stall in Freedom Square, Soweto, South Africa, Monday, Dec 10, 2012. Various leaders and personalities have called for people to pray for former president Nelson Mandela as he underwent more unspecified medical tests in a military hospital in Pretoria as the public and journalists outside continued to ask the same, as of yet unanswered questions: What, if anything, is wrong with the 94-year-old anti-apartheid icon. (AP Photo/Denis Farrell)
A young girl walks past rosaries hanging at a hawkers stall in Freedom Square, Soweto, South Africa, Monday, Dec 10, 2012. Various leaders and personalities have called for people to pray for former president Nelson Mandela as he underwent more unspecified medical tests in a military hospital in Pretoria as the public and journalists outside continued to ask the same, as of yet unanswered questions: What, if anything, is wrong with the 94-year-old anti-apartheid icon. (AP Photo/Denis Farrell)
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