BBC News with David Austin.
Tens of thousands of supporters and opponents of the Egyptian President Mohammed Morsi have staged rival rallies around the country ahead of the first anniversary of his coming to power on Sunday. Egyptian security officials say that in Alexandria, a young American man was killed during the protests. Jane O'Brien has more details.
According to Egyptian security officials, the young man was stabbed in the chest during anti-government protests, although some reports suggest he may have been wounded by gun pellets. He was apparently using a mobile phone camera near an office of the ruling Muslim Brotherhood party which was being attacked by opponents of President Mohammed Morsi. He was taken to a military hospital where he died from his injuries. Egyptian state television described the man as a photojournalist, but Alexandria security chief Amin Ezzedine said he worked at a US cultural centre in the city.
President Obama has arrived in South Africa after playing down speculation that he might visit Nelson Mandela in hospital. In comments on board Air Force One, Mr Obama said the last thing he wanted was to be in any way obtrusive. James Copnall reports.
Barack Obama will meet his South African counterpart Jacob Zuma and is expected to make a major speech during his stay here. But there is no doubt his visit will be overshadowed by Nelson Mandela. The global icon is still critically ill in hospital. Mr Obama has already said he is not looking for a photo op or to get in the way of Mr Mandela's family. Winnie Madikizela-Mandela, Mr Mandela's ex-wife, said she felt it would not be right for Mr Obama to visit the hospital given Mr Mandela's condition.