Earlier, presidential spokesman Mac Maharaj said the trip to a hospital in the South African capital of Pretoria was not planned|”We know he has a history of lung problems, from TB to a proneness to infections,” said Maharaj, adding that the doctors believed the complications Wednesday night were a “recurrence of those old problems.” “We appeal to the people of South Africa and the world to pray for our beloved Madiba and his family and to keep them in their thoughts|At the time, his granddaughters said he was in good health and good spirits|The first picture of Mandela after his discharge wasn’t released until early February|”He was being monitored at home very carefully, around the clock|Emma Hurd, reporting for CBS News from Johannesburg, said on “CBS This Morning” Thursday that Mandela was undergoing treatment to clear congestion in his lungs|At his birthday last July, CBS News correspondent Mark Phillips was granted rare access to the party at Mandela’s home| “No, this wasn’t scheduled, as you will appreciate the doctors do work with a great sense of caution when they are treating (Mandela) and take into account his age,” he said}