Gen. Muhammadu Buhari, presidential candidate of the Congress for Progressive Change, attends a campaign rally in Lagos, Nigeria, Wednesday, April 6, 2011. Buhari, a former military ruler of Nigeria, has gained support in his third bid to become president of the oil-rich nation. Buhari ruled Nigeria from 1983 to 1985 after a military coup deposed the elected president. (AP Photo/Sunday Alamba)