Ugandan security officers secure a street on May 11, 2011 in Kampala, where opposition leader, Kizza Besigye, had been scheduled to arrive from Kenya, though never appeared because his flight was blocked. Besigye was in Nairobi, where he had sought medial treatment after an assault by police who broke his protest in Uganda against rising living costs. The incident came on the eve of the swearing-in ceremony for President Yoweri Museveni, who won re-election after February polls in which Besigye mounted the strongest challenge yet to his 25-year rule. AFP PHOTO / TONY KARUMBA